Lol you could just divide Pulse into 6 different cells and then toss them all in the cell pool, or create individual cells based on the actually used ones like this. This really does seem like a cell that is hard to deal with. It might also be an option to allow players to change themselves what hit the pulse perk will activate (every hit of course :)), but that might lead to another set of problems down the road.
I liked pulse, but can understand if it does not survive the change. Hopefully you will find ways to salvage some of the harder to update ones though.
Pulse is exactly that, hard to deal with, but also very cool. I genuinely believe Pulse is one of the better Cells we've made from a pure design standpoint, so I definitely want to try to save it through these changes.