I think the obvious consensus is controlling the Acklay's enrage and the opening 1st move from GBA to do so. Second priority is controlling the AOE ability Jedi on the field. Regardless of what you do to the Acklay, if you don't control their AOE, it's more likely to be a wipe. I've been pretty lucky so far. My first attempt was with a G13 R3 GBA and G12 with the others. GBA's Brute synergies to G13. I've since brought Spy to G13 and gotten the furnace pieces on everyone to boost health.
Once AOE are under control (ability blocks, stun, etc) it's hitting auto on attacking the Acklay. Paying attention and going manual when debuffs on Jedi drop or getting close to enrage. Keep Jedi alive as long as possible and hoping they single attack the Acklay. AOE's if they slip through are going to hurt and can be tough to recover from. Rinse and repeat.
Warrior has a pretty good video detailing this exact thing and I tweaked my bugs accordingly. I'm 3 - 0 now for Acklay and Wat.
https://youtu.be/4xILiDi_Q8o