I honestly don't know why you're trying to balance Raveshaw and Sydney. They are in a pretty good place right now. The time between shots is long enough to be able to kill them or get them extremely low if you have half-decent aim. Most of the time, a Patch can easily kill a Raveshaw, or a Mendoza for a Sydney. 2 or 3 coordinated soldiers can also kill a Sydney or Raveshaw.