Yeah, this has gotta be part of the non-Concentration-related issues. OA's are brutal in a game where the HP's are so low. If a critter gets hit on an OA because they want to disrupt your Concentration that hard, you've just decreased their life expectancy by a round or two.
Hit points aren't very low at higher level. In fact, they are rather high. I can't even take out higher level yard trash with a 5th level
fireball. It takes fighters multiple rounds to kill one of the yard trash.
That's part of the strategy here. If he has to kill you one at a time, your party has PLENTY of time to react to the attacks.
No. They don't. He kills one person a round or two. If he hits with the breath weapon to open, a lair action, and a legendary attack, you're maybe down. Next round you're down for sure. Why do you think they have time to react to attacks? He's killing piecemeal quickly. Legendary Creature damage output is enough to kill anything except for barbarians barbarians in a round or two. Last legendary fight, cleric was down by round 2. Fighter by round 3. I think paladin lasted long enough to get fighter back to his feet, then was down when second breath weapon hit due to lucky recharge roll.
Not how it is working. There is no time to react. The Legendary Creature kills that fast.
Again, why aren't you taking non-concentration spells? The reason you gave was because they weren't "effective," and I pointed to that as part of the root of the issue: you're writing off a lot of magic that is really quite effective as if it's nothing.
Save spells aren't effective due to Legendary Resistance.
Concentration spells aren't effective due to one concentration slot.
You do the math as to what is available. You have to choose spells that do two things and are effective:
1. Don't require your concentration slot.
2. Don't give the creature a save that it will either make normally or using legendary resistance.
So give me all these hugely effective spells that meet the above criteria. I'm using
scorching ray at the moment. It's the main I could find that would be effective.
I suppose if what you want to do is EVERYTHING, then yes, you are going to be disappointed. But wanting to do everything is wanting too much. Re-calibrate your expectations. Be OK with not dominating.
How are you translating that as wanting to do everything? I want to be able to play different casters with different characters. That would be pointless given the small selection of spells that is effective. You are not comprehending what I'm saying.
I want to do this:
1. Wizard 1: Evoker. Uses evocation spells to kill thing.
2. Sorcerer Character 2: Wants to use domination spells to control things.
3. Wizard character 3: Wants to use summon spells to summon creatures to fight.
Instead I'm playing "Wizard that does the same thing over and over again because the martials need their buffs and concentration is used for that. And don't cast anything on the Legendary Creature that requires a save. It auto-saves."
Can you imagine using your 9th level spell slot on a creature that can auto-save? Don't even bother doing it. Pick other spells that don't use your concentration or allow a save.
At least you have
Foresight and
Power Word Kill.
You're setting up this strawman of my play experience so you can easily knock it down without bothering to question if this caricature you've drawn has any resemblance to reality.
I've played 10 levels and this is my experience. I'm setting up no straw man. I'm telling you how it is has been playing for me. It does resemble the reality of what I've been dealing with.
Look at my earlier posts at low level when I thought wizards were grand. Somewhere along the line my experience changed. That change occurred when I started fighting Legendary Creatures that auto-saved and had special powers that required me to use my concentration slot to buff the martials to make them effective, making my options extremely limited.
This is how it has worked for me as I faced more legendary creatures.
It's fine to not do everything. It's fine if martials take full damage from energy attacks or have to use a bow every once in a while. They have the capacity to deal with this stuff (evasion, second wind, healing potions, ranged attacks). You don't need to do that for them.
It's not fine. They die quickly. Legendary Creatures can take a PC from max hit points to dead in a round or two. This is not ok. Not sure why you're telling me it is.
Evasion doesn't work against Con saves from cold or poison. Healing potions take actions that allow recharge checks. If something recharges, the 2d4+2 or 4d4+4 healing potion isn't going to help.
It's not fine they use a bow if not dex-based. A Legendary Creature's AC is built to require the best hit roll possible from the PC. If he using an inferior weapon that does low damage to attack a Legendary Creature, he is going to lose that fight. We're all going to go down because of it. Why do I know this? It has happened to us twice now.
I think part of our different experiences is because I don't expect my casters to be able to do everything all at once,
I never said all at once. Please stop assuming this.
and I trust my other party members to stand on their own two legs without me babying them with magical padding. A magic buff is nice, but it's hardly necessary. Same with a magic debuff. And I don't need to do both at once because either one is still quite nice.
Really? You want to watch them die. I guess I should just watch my party members die.
Gee Mr. Fighter, how come you didn't take all that breath weapon damage, the lair action, and the multiple legendary attacks? You shouldn't be dead because of it. It has reach? You can't fly? It moved 80 feet, used reach to attack you, then flew away? Sorry, I can't coddle you. Pull out your bow? You only have a 14 dex. Sorry, bud. You should have played an archer.
Really? That's how I'm supposed to play? Same with the defensive fighting paladin with the 8 dex who had to spend his points on Str, Con, and Cha? Sorry he didn't have enough to buy all good stats. My bad.
Hey paladin. boost your dex. You're making me waste my time casting that
fly spell on you. I'm sick of the dragon kicking your butt with six attacks on you per round. It's tiresome. You should be able to take that damage.
Really. I don't understand you telling me this. Why are you assuming I don't know what I'm doing? I've tried all these strategies people on here are recommending. They don't work very well. My best strategy is cast
fly on the martials and let them go after the creature. I can't allow a mobile flying creature to strafe us with attacks and hope they can kill it with inferior bow skills. I can't do it. The creatures damage output will far exceed the martials using inferior weapons.
My last combat had me making decisions between casting hypnotic pattern, phantasmal force, invisibility, and crown of madness for Concentration spells. I used HP, and I didn't really miss the other ones -- instead, I kept my distance and spammed Sleep spells and managed to deny the actions of a fortress full to bursting with downright AD&D-levels of monsters. And my melee allies weathered the storm of goblin-knives just fine without turning any of them or myself invisible (and being a sorcerer with a 12 AC, they did a fine job by and large of being in melee and keeping the hoard occupied). It was a difficult combat where I used up every single one of my spell slots and every Sorcery Point I had and finished the combat with 3 hp, and I felt effective and had interesting decisions to make on every turn.
I loved it when
sleep worked. Those were great times. I love it when
hypnotic pattern works on yard trash. I loved it when I could clear yard trash with
thunderous wave. Made my life easier.
That was before the yard trash had 50 to 70 hit points each. Did advantage on all attacks in a group and extra damage in groups as well. Back in the good old days at level 5 or so.
That's a success. And I would not have enjoyed the combat nearly as much if I just spammed HP over and over again -- I would not have had interesting decisions to make.
That's just an anecdote, but it points to the problem not being intrinsic to the Concentration mechanic, but rather having more to do with playstyle, expectations, and experiences.
I miss the days when those spells were effective and I was having fun. It isn't the case anymore. The stuff I fight now resists a lot of what I use and requires more damage to kill.