[x] Hit and Run. Keep their attention with hit and run tactics, only going for a decisive strike once you have an opening from Rukia.
-[x] Karin focuses on keeping the Hollows off Rukia, Rukia focuses on Kido.
--[x] Keep their attention on you. Use taunts and frequent enough attacks to keep them from being able to outright ignore you to go after Rukia instead.
--[x] Use terrain to your advantage. If Rukia can get to safe, high ground, that's where she should be. If you can use tight spaces to make it more difficult for the hollows to maneuver, do it.
--[x] With you holding them at bay, Rukia can focus one down at a time. Assist if you see an opening, but prioritize holding them off.
--[x] If you get openings for clean attacks, prioritize disabling their ability to attack from range and disabling their mobility.
--[x] If Ichigo makes it there before you two finish them off, get him to help Rukia focus them down one at a time. He's liable to charge in face first like an idiot, which may present extra openings to take advantage of.
---[x] Don't let him get smacked around just because he charges in face first. If there are still two up, make sure the one he isn't hitting doesn't take advantage. If there's just one, keep it from getting a clean hit on anyone.
[x] No, keep your sword sealed.