Need tips for beating AT-ST...and everyone else

So timing the Undermine isn't going to work very well if Kleya goes before the AT/St on turn 1 (which won't happen to you at L30) or if Kleya goes after the other allies (which probably will happen to you). 

I would STRONGLY recommend boosting Kleya as soon as you can. If Cinta was 48 and Dedra was 45 you would be in a better position. 

If your primary problem is Credits, you're in luck bc we're at that point in the season where you can earn them quickly by getting to the Era Bonus Node. If it's mats, then I think it's actually worth spending a few hundred crystals. I'd keep the spending under 1K crystals, but you need something to boost you and it's only a couple days worth of crystal progress in exchange for getting your coliseum rewards going again. 

After boosting Kleya, take in a Rebel only squad (leave Dedra out). If Kleya goes after the AT/ST on t1, use middle ability first, hope you land undermine, and then have everyone use their specials to get Cinta assisting and ramping damage. 

But if Kleya is going after AT/ST on t1, my best suggestion is to is to use the 3rd ability first, buff herself, and hold the Saw special for one turn so you can undermine on Kleya's 2nd turn and then blind the ATST when it can't gain TM. (It's okay to use Saw's Blind maneuver before Kleya uses Undermine as long as you can see Kleya will get a turn before the AT/ST)

Vel does not usually land Blind, so I wait until damage on the AT/ST is over 50% (ideally Vel would get a turn right around 60%, but don't be afraid to go closer to 50) then use Vel's special so that you get tanky right at the same time that the AT/ST damage starts to hurt. 

It's not easy enough to win every time even at your levels, but you can do it. 

Anyway, that's my best attempt at help. If you want to stream it live and talk it through, we can also do that on Discord.