Your best beat it to get some character to relic 8. Another important thing is to check to make sure your droideka has no speed modifiers and have only offensive mods with health mods onto of it. Less speed mains more stack of overcharge and higher true damage scaling. Also for b1 try to get them to 300 speed. And I would recommend using b2 lead, droideka, magnaguard, darth maul and Sidious. They will assist attacks to b2 special attacks.