pulled Thylessia and Mistrider Daithi last night. trying to figure out who i should focus on first

also included a pic of my main roster.

i’m newish and i think with where im at, both could be great use to me.

Im currently stuck on Spider 10, Dragon 13, and im only hitting about 6mil damage on Demon Lord hard.

what do you guys think? both of the 2 look like they’re good, but just want to see if any of you guys have experience with either. thank you!