Thrawn 7 star help request

Hey just looking for pointers on how to further work on phoenix, I tried throwing on some better mods on them and all but still get crushed at the last wave (blaze thru the rest of the event at least) the best I've done so far is kill a single deathtrooper so I'm assuming I have a long way to go and might need to wait till next time but still need the pointers, thanks

Link to my stuff
https://swgoh.gg/u/talilover/collection/?f=phoenix