Although I stand by what I said earlier, I also took a look at your droids for fun, just to see if there was anything obvious.
There is. Your mods are all wrong. Like really wrong. B1 should have no health sets at all. You currently have 4 mods on B1 that use Health Set Bonus.
Next, you have 2x Crit Damage mods on B1. But Crit Damage Set Bonus doesn't apply unless you have 4 CD Set Bonus mods. It's like speed mods, not health mods, so you wouldn't increase your crit damage at all by using 2 CD mods.
Next, even if you did have 4x CD mods on B1, B1 can never, ever, ever score a critical hit. Not even with Advantage. It's part of his kit. So you never want CD mods on him at all. Or CC% mods. Health mods are worthless because B1's health is maxed at 1. That's just 1 single point. He operates off Droid Battalions which are a different mechanic than Health. Since there's no amount of Defense that will cut damage of your opponents to less than 1 point, Defense Set Bonus mods are also worthless. B1 inflicts no debuffs, so Potency is worthless. Tenacity can be useful in certain situations, but not many because most attacks that inflict debuffs also deal damage, which removes a stack of Droid Battalion and, in the process, cleanses any debuffs. There are enemies like Old Ben or JTR that use special abilities to inflict debuffs without damage, but they aren't involved in this event. So Tenacity Set Bonus mods and Tenacity Primary abilities are worthless. Crit Avoidance Arrows are also worthless, since even without a critical hit, your enemies will still do at least one point of damage, which is all it takes to remove a stack of droid battalion. There's no such thing as a protection Set Bonus mod, but there are Protection primaries. Since B1's protection is capped at literally zero, there's no benefit from a protection primary.
So none of your B1 mods are any good at all. The only mods that really help you are Speed Sets and Offense Sets. Each of those requires 4 mods to have any effect, so you probably have to add a pair of mods with unhelpful set bonuses at the end, once you have the best Offense or Speed set you can get.
But even if you can't get a good set bonus off those last two slots, you can make sure your primaries are what they need to be (Offense or Speed Arrow, but preferably Offense, Offense Triangle, Offense Cross). Obviously the square can only have an Offense primary and the Diamond can have only Defense. The circle seems like you have a choice of primary, but it's between Health and Protection and neither of those help you, so just ignore the primaries & pick the mods with the best possible secondaries.
Your other mods also require a lot of work. Droideka for instance should not run a Speed Set. Droideka gains bonus damage when it is slower than the enemy, and the amount of the bonus gets bigger the slower Droideka is.
In general, I think you've very, very far from ready for this event. Watch some mod tutorials, add gear to your droids & be patient. You'll get there, but not today.