Infighter vs Gunslinger

I would read my build, and any other Viper build:

Basic Viper Start -

120: +1 Fist(1), +1 Wind Booster(1), +1 Dragon Strike(1)
121: +1 Fist(2), +1 Time Leap(1), +1 Wind Booster(2)
122: +1 Super Transform(1), +1 Demolition(1), +1 Snatch(1)
123: +3 Wind Booster(5)
124: +3 Wind Booster(8)
125: +3 Wind Booster(11)
126: +3 Fist(5)
127: +3 Fist(8)
128: +3 Fist(11)

I have read these builds, but i said we won't see either of these skills MAXED. Atleast not for a while. Having windbooster at lvl 11 early though does sound good, since any higher only increases time.

Devil keeps talking about a 6 viper party for continuous Super transform for all 6 members, but wouldnt that require all 6 members to have max time leap + max super transform?