for damage, I would go battlesmith with one level of fighter.
rockgnome so you can ride your steel defender, greater mark of handling feat.
dual wield, 3 attacks with extra attack + 2 attacks for steel defender(1 default +1 for gr mark of handling feat)
that is online at 6th level.
more usages, maybe add that you can spend Second wind if you run out.
temp HP could be healing 1st and then leftover as temp HP.
add that you can make one weapon attack as part of Bonus action activating fighting spirit.
adding +1d8 damage to each attack during fighting spirit is an option...
if you take a step back, 4E was really class-less system, you could take any power from any class at specific level and not break anything. Minding pre requirements of base class feature and even that you could get with base multiclass feat.
you wanted your fighter to be better at archery...
This would best work as action RPG similar to witcher3.
where you would pick all abilities that you want and focus on what you want;
more spells, more martial, more skill/face/stealth or just mix of everything.
I would say, to be similar to Fey touched/Shadow touched:
+1 Int, Wis or Cha
Pick two 1st level spells from any class.
you can cast each spell once without a spell slot per Long rest.
you can take this feat multiple times, you must pick different spell every time.
you can cast this spells...
maybe at 13th level, get a level of paladin or some other way to get Divine favor, it's better than Hex/HM as it does not use Conc and uses only 1 Bonus action per fight.
If going dex path, might invest in CE later on(12th level), you can keep the shield or just use a cantrip for 3d10 damage as ranged option.
also problem with CME, can you count on short rests being available?
bight boil down to once per day combo...
Off-topic, vicious weapon should be...
bards are little overtuned in spellcasting department.
full casting might be too much for bards.
I would give them 2/3rd spellcasting, spells from 1st to 7th level.
but make spell secret default in their spellcasting.
Bards can pick spells from any spell list.
versatility is payed by not having...
those are all viable weapon choices if they are on weapons that PCs use.
heh, I dont see anyone making +1 chain mail, at least in 5E armor design.
magic armors(+X) are only;
1. studded leather
2. halfplate or breastplate if you care about stealth
3. fullplate
if the DM hands out are not items that PCs want to use, then it's the DM problem.
why bother in writing down magic items for PCs that will be glorified gold bars that will end up as "vendor trash"?
Extra attack subclasses need ability to use one cantrip instead of one attack form Extra attack feature.
maybe base class needs extra attack and those 2 gain that ability at 5th level with something extra on top of that.
Also one thing that I find problematic about skill checks is the "d20".
It is simply too unreliable.
attacks and saves are OK in general as across the party and whole combat there is 50-100 rolls for them, so that evens out a little, but when the whole encounter rides on 1 roll, maybe 2 at...