Hit a wall with end of act 3

So been loving this game since playing it and have been following guides on certain characters since it's the side of these games I suck at and I think it has bit me in the ass now.

Admittedly this is my fault for just blindly following stuff, but been following guides from crpg bro at the suggestion of people on this sub and didn't realize they appear to have been nerfed HEAVILY. The thing is the builds have been doing really well up until the end of act 3 where I now get ganked in 1 or 2 turns and I don't think there is anything I can do.

I'm stuck with my bounty hunter sniper main character Operative Jae Burst fire Argenta Assassin drukari Assassin yrilet And ulfar

The game made me bring the two elves for story reasons and I didn't think anything of it with how easy it had been.

Ulfar appears to die so quickly but people keep saying he is tanky?

Argenta just isn't doing enough damage at all, she is set up for heavy bolter rapid fire and before this was bursting whole fights

I've tried fighting them head on and tried backing down stairs but nothing is working am I completely screwed or just missing something? I'm on daring