Resilient (Con) or Sentinel Feat for Circle of the Moon Druid? [closed]

Question

I am a newer D&D player. I am currently running through The Lost Mine of Phandelver adventure for 5e. My party consists of a Half-Elf Cleric, a Moon Elf Ranger, and myself (Hill Dwarf Circle of the Moon Druid). We have just reached level 4, and I am trying to choose my first feat.

Since I am probably the more tanky of our party, I was leaning toward either Resilient (Con) or Sentinel. I know War Caster is also a highly recommended choice; however, I don't spend much combat time outside of wild shape, and I haven't reached the level where I can cast spells in wild shape form yet, so I can really only use the advantage on con saves that feat offers. This adventure doesn't get you past level 5 or so; therefore, I don't see me getting much mileage of War Caster in this adventure.

Which of these feats would be the better feat considering our party and the adventure we are running?

My general character theme is as follows:
My druid was raised by Dire Wolves. While he is not very social, he has a pack mentality ingrained into him, so he wants to protect allies he thinks are weaker or more vulnerable than him. While these two feats seem to be the best two choices, if another feat helps to meet my goals better -- good tank, protect the weaker members of the party -- then that will make for an acceptable answer.

Answer 1

Sentinel will best help protect

Resilient (Con) will help a druid to have more humanoid-form HP and to maintain concentration checks. You say, however, that you're spending very little combat time outside of wild shape, reducing the perceived benefits of this, since wild shape replaces your physical stats. While wild-shaped, this feat essentially nets you just a proficiency bonus to CON saves. Having advantage on concentration checks instead is significantly stronger at the levels it seems you'll be playing at (citation needed, but incoming), meaning Warcaster is actually a better choice for your requirements than Resilient (CON).

Those two feats mostly help you though, rather than your weaker allies, unless you've got a plethora of concentration spells that you're using to protect your party.

Sentinel will instead allow you to get more opportunity attacks and be more "sticky" to your enemies, which can help keep them off your allies, protecting them, making Sentinel the more obvious choice for your prescribed goals.

Answer 2

Sentinel will see more usage

You can spend at least 2 x 2 hours in Wild Shape right now, and soon you will be able to cover the full adventuring day, especially with short rests.

Even if you are never beaten out of concentration, no spell lasts this long.

Other benefits of Resilient

While concentration will not come up often, the importance of Con saves is only comparable to Wis saves.

If you have an odd Con attribute, this feat is even me valuable. Depending on your DM, the +1 Con might also improve your Wild Shapes.