In order to get more variation to Mechs and customization options, instead of having a fixed 3 SP+ 2*Tier, a generator could add this variation. Also out of combat generators should regen at a rate of 10min (1 hour is a long time for multiple Mech battles)
------------Base SP----SP/Tier----Regen/Round----Cost
Pulse MK0. . .3 . .......2...........Tier/2........0
Pulse MK1. . .4 . .......3...........Tier/2........1
Pulse MK2. . .6 . .......3............Tier.........2
Magi MK0......3..........1............Tier.........0
Magi MK1......4..........2............Tier.........1
Magi MK2......5..........2...........2*Tier........2
Lasting MK0...6..........4...........Tier/4........0
Lasting MK1...9..........6...........Tier/4........1
Lasting MK2..12..........6...........Tier/2........2
Pulse is Balanced, Magi has lower pool but recovers faster and Lasting haver a bigger pool but slower regen.