This was my team last time:
The team I’m going to try this time:
I pulled Kiril during this last Atlantis, and while he’s not well leveled yet, his defense and hp both already exceed Gato’s, his attack isn’t far behind at 499 vs. 517, and he’ll add more opportunity for healing and attack buffing, plus the benefit of a defense buff.
So I think he’s worth swapping in.
This Trial was pretty easy and low-item for me last time thanks to Proteus. 
I’m hoping with the addition of Kiril and Emblems on Boldtusk and Proteus it’ll be even more straightforward this time around.