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As far as elven rangers in the rain go, is that a bug or a feature? It looks to me more like the latter.The skirmishing is just too good... sounds like a single enemy will never know where you are and just dies. An elven ranger will find the right situation to surprise the enemy. Enemy alone + elven ranger + rain = dead...
The idea that the peers of Charlemagne, or the knights of the Round Table, are not distinctively sectarian is also puzzling to me. The Song of Roland has Charlemagne and the peers fighting Muslims in Spain. The Arthurian stories are likewise infused with Catholic Christianity.
Whoops a few wights recently. I have a low opinion of them. Necro's captureable undead are very strong though. That feature is wonky. Straight wonky.
Well by the time you get them though, the ranger is one level off him and his pet sharing a cheap stoneskin or proct from energy.
Yeah, maybe. When I first read the rule I interpreted it as meaning one could only take an action on the special turn, not a bonus action or a move, and that action was limited to Attack or Hide. After reviewing it I realize I read into it what made sense to me, and I would definitely rule it that way, since a full turn is too much as your examples demonstrate. I feel like that might've been the intent, but if it was it needs to be made crystal-clear.
As far as elven rangers in the rain go, is that a bug or a feature? It looks to me more like the latter.
If the action thing is a full turn of actions, where you can only take Attack or Hide as your actual action, but, you still gain move and bonus/reaction actions, this is ridiculously overpowered.
Why wouldn't every single PC in the group dip for this? Imagine a 5 PC party where it can never be surprised, ever, and virtually always gains a free round of actions before the NPC's can act. Sure, the casters can't drop regular spells, but, sorc's can Quicken spells to become bonus actions. Burn a few points and poof, you drop a spell before the first round of combat, then shoot a crossbow for your action, then get your regular suite of actions in the first round. The fighter/rogue types just walk up and beat on the baddies for free.
This is a rule that does not play well at all with the rest of the game. It's so overpowered that it doesn't make sense that the group wouldn't take advantage of this. Which classes wouldn't benefit from this? Maybe a straight up wizard or bard, I suppose, since they don't get many bonus actions. Cleric can use it to just move up and beat on stuff, as can the druid. All the "beat on stuff" classes would get major benefits from this.
This is a very, very bad idea.
The thing is
The paladin's steed is a CR 1/2 warhorse, CR 1/8 pony, CR 1/4 elk, CR 1/8 mastiff, or CR 18 camel that never gets stronger.
The same reason everyone doesn't dip rogue for expertise, 1d6 damage a round, and Cunning action.
It's not worth the level dip unless you can do something major with "Attack/Hide+move+Bonus action into Normal Turn " every single combat.
And only rangers, rogues, and fighters really do that. Move into position, Bonus action attack, Attack Action. Pretty much TwFer and archer only. Sorcerers lack the points to repeatedly quicken to use bonus actions and the other casters would barely use the extta turn.
But it's mostly for sniper archers.