[2019] Will B1 and Droidika be required? I'd say yes since you get less shards for them in the pack.

Not hard required. But it will be easier with the Separatist Droids because they’re much more powerful. Honestly it’s a similar strategy to Chewie where the newer Bounty Hunters made it much easier, but shortly after the event started, people were posting proof they’d done it with all the older BHs. We’ve seen some people in testing pull that off with some of the Separatists and will leave it that way for sure.