Feat choices for (non optimized) Revised Hunter Ranger

[Spore]

Longtooth Shifter Hunter Ranger 3 going for pure class (maybe Rogue dip if it is very beneficial but I don't want to impose on the Thief Rogue's turf).

Str 14/ Dex 17/ Con 13/ Int 9/ Wis 14/ Cha 10

I was thinking of taking Resilient (Con) for concentration checks and dangerous saves (poison etc.) and to buff my health pool. After that I am out of ideas barring pushing Dex to 18/20.

[Sir cryosin]

Healer feat, lucky, alert, martial adapt,.

Edited: medium armor master ac of plate and no disadvantage on stealth.

[Specter]

4: Resilient (CON)
8: DX+1 IN+1
12: Sharpshooter/Dual Wielder/Blade Mastery from UA (you didn't mention your fighting style, but one of these should help)
16: Lucky
19: Dx+2

That's how I'd do it.