How to counter Phoenix teams?

Any buff cleanser, toons ignoring protection, stuns,
I see that you have sion and boba, so combo with cleanse and AoE ability block sorts the problem,

Also at this early stage you can benefit of Phasma lead with kylo and SF tie pilot, turn meter boost, advantage, speed down AoE, assists, assists, assists, so if you lack speed mods this helps

plus damage over time from Boba and healing immunity from Kylo.

At this stage of the game bobas undispellable buff is hold, cause you have to kill him at least twice lol

Added value is that apart from sion you use all in ships