I am not sure how much Infernal constitution is doing for you.

Your stat line looks pretty similar to my BG3 character,
I think it is: str 16 dex 14 con 14 Int 8 wis 11 cha 12
With Str + 2, GWM and Resilient wis as feat selections.
But this was after trying to use Medium Armor Master and a str & dex of 16, but the feats value proved to just not be high enough to warrant.
I am curious that it might be a similar situation on your end, for IC it looks like the only big benefit is +1 con, but +2 str and Res: Wis are going to likely have more value than that.


This is also a straight barbarian though, I have few oppinions on barb/rogue other than it is in fact possible.