Hi!
I have a NG Hill Dwarf Acolyte Life Cleric of Desna 15
AC 22
HP 138
Str 14 (23 with Belt)
Dex 8 (10 with Ioun Stone)
Con 15 (16 with Resilient Feat at 4)
Int 10
Wis 16 (20 with Feats 8 & 12)
Cha 12
Has a Dominant +1 Warhammer, +1 Full Plate, +1 Shield, Medusa Mask from RotRL, some scrolls, a wand of magic missile, cloak of +1 Con saves.
I mostly buff and heal, I usually tank while casting, and I try to be within melee of most BBEGs since I have a good AC and hit points. I used the standard array for ability scores, and I take the average hit points each level. The spells I usually cast are bless, cure wounds, guiding bolt, healing word, spiritual weapon, mass healing word, spiritual guardians, greater restoration, insect plague, mass cure wounds, heal. I occasionally use lesser restoration, inflict wounds, banishment, stone shape, contagion, and various divinations if we're in puzzle solving mode.
Skills are Insight, Medicine, Persuasion, and Religion.
We just hit level 15, so I haven't had a lot of experience with my 8th level spells. I'll probably prepare earthquake moving forward.
But 16th level is coming up soon, and I need help determining my 16th level feat. Things I'm considering:
+2 to Constitution (+16 hit points, +1 on Constitution saves)
+2 to Dexterity (Shore up a real weakness, but it's kind of a big character trait)
Alert (mostly for the +5 to initiative. 99% of the time, I go last, and that is hilarious, but it hampers my party buffing)
Heavy Armor Master (DR 3/- is nice, but is it worth it at level 16?)
Lucky (3 PCs already have it, and we have a Portent-using Divination wizard, so there are lots of d20 manipulation tricks at the table already)
Mage Slayer (I'm up front a lot, and we fight lots of spellcasters, and my melee attack is +12 to hit, 3d8+7 damage with my Divine Strike ability, so it will be cool; also Advantage on Saving Throws from adjacent spellcasters will also be helpful, given my usual position in battle)
Magic Initiate (getting goodberry, produce flame, and thorn whip to get 40 hit points from 1 first level spell and some battle utility cantrips)
Savage Attacker (depends if the DM allows me to re-roll ALL 3 dice of my Divine Strike weapon damage dice (1d8 bludgeoning + 2d8 radiant))
Sentinel (Since I'm usually up front in melee, I can lock down the BBEG)
Shield Master (I just really like the Shove action, and getting to use it as a bonus action would be nice. Adding +3 to some Dexterity saves would be really nice, and using my shield for quasi-Evasion would be nice)
Skilled (Adding +5 or +6 to Athletics, Perception, and maybe Arcana, History, or Survival)
Tough (+32 hit points is nothing to sneeze at, and it would fit the flavor of my PC. I have died 3 times already (the only PC to do so), so I could use some survivability enhancement)
War Caster (using spells to make Opportunity Attacks sounds super fun!)
So lots of options. I'm also looking for fun feat synergies with my 19th level feat, like Shield Master + Skilled (+12 on Shove checks!), Sentinel + War Caster (stopping a monster with a cantrip!), Mage Slayer + War Caster (fighting spell fire with spell fire!), Constitution +2 + Tough (+60 hit points at 20th level!).
And this campaign WILL got to 20th level. We've taken the PCs from 1st to 13th in RotRL, and we're going to take them up to 20th just to see how high level play goes.
If it matters, the other PCs are a human divination wizard blaster, an elf arcane trickster rogue archer, a human hunter ranger archer, a half-orc berserker barbarian with a golfbag of heavy weapons, and a human eldritch knight two-weapon fighter.
To narrow down my options:
+2 Con
Lucky
Mage Slayer
Sentinel
Shield Master
Skilled
Tough
War Caster
I would say strength if the Belt of Giant Strength weren't already taking care of that. (I really don't like how this item works, it just allows strength based characters to completely disregard what is supposed to be their primary stat)
With your character being the only pc to have died so far and having done so several times, I would advise against Sentinel. Your character seems to draw more attention than they can handle already.
The others all sound fair
I'd go for War Caster, since it would seem you tend to have your hands full with a weapon and shield, and being at the front line, you are probably going to have to take hits while concentrating on spells. The opportunity spell attack part I don't need to sell you on, I suppose.
I went around 10 levels with 14 Str. It was OK. It became phenomenal with the Belt, though! Combined with my Divine Strike ability and +1 Axe, I have a +12 attack bonus and do 3d8+7 damage! :-O My melee weapon attack is WAY better than my spell attack bonus of +10.
The Resilient (Constitution) feat is amazing! It's like a combination of Combat Casting, SUPER Great Fortitude, and Toughness all rolled into one. It's kind of passive, but it's saved my bacon so many times!
Ding! Ding!! Ding!!!
We leveled up at the end of tonight's session. Now we're 16th level!
I'm leaning towards Lucky, Mage Slayer, Shield Master, and War Caster.
Today, I botched a couple of saving throws that really hurt. I got dominated by a vampire mage and got frightened by some slaad. Not cool. 3 other PCs have Lucky already, but re-rolls are sooooooo useful! I know I'll use it a lot. It's just the others are pretty situational.
I think War Caster also gives you advantage on Constitution Saving Throws to maintain concentration.
Considering you're a cleric, and they have some pretty nice buffs to concentrate on, it sounds like it could be a good fit.
Decisions, decisions. At least my next feat is only 3 levels away instead of 4... And high tier levels seem to fly by.
I think I'm going to go with Lucky. It's a classic for a reason, and it kind of fits being a cleric of Desna.
Deific obedience.
Is that a 5th Edition feat? From what source?