It won't work.

1. Everyone agrees it would be overpowering to use multiple 70+ rage pacts in a row.

2. A charge system would only allow you to use more low level pacts at start, then you are stuck waiting on the charge timer like it were a BP timer. Until you take a break of course.

What we need is more access to low level pacts period, while not allowing more high level pacts. The only reasonable solution to this is splitting timers further.