Generally classes that have low mitigations, low health, require a gimmick to AOE properly, have to be rooted a lot for their damage, and have fair to poor CC skills and no panic buttons without the ability to effectively kite, suck at multiple mobs.
You could go the CC route with Yellow, or try the mobility route with Blue. Generally if your DPS is high enough you can use Thorns to pin everything down and then burn them one at a time, if they don't resist the Root.
If not, Lay Trap + Like-Level Triple Traps will help.
My other Warhorse is a Fleet Tactical Escort Retrofit,[I] Defiant-Class[/I], [I]U.S.S. Say My Name[/I], NCC-93144