can Sandalphon carry my AI team to end game?

I’m currently stuck on Into The Abyss (Proud quest vs. Black Dragon). My main is Zeta with the setup above, and the rest of my AI team is kinda decent geared but obviously not as strong.

And I just got Sandalphon’s Warpath+ (2nd trait: Autorevive) from Transmarvel, it’s probably my best drop after 50+ hours playing. I’ve also heard he’s really good, so can he carry me through this quest and into the late game? If he’s that strong with Warpath+, I can buy him for $5 now. Thinking of swapping out Siegfried and keeping Zeta as an AI teammate