ya... this is exactly the points I was going to bringup yesterday.
* FA on fixer is the kill shot, and takes a while to recharge
* If FA is down... GL killing anyone
Whereas on keeper, for example, your alpha is back every 65 seconds, (80 if you want pain lance), but you can put out a lot of damage even if your alpha isn't up.
When I played my 170 keeper you can actually out damage some profs healing capability just by inflicting heavy normal damage and even make a kill with a fast attack+brawl+wrath. It's not the most reliable, and it will only work vs weaker players, but it IS possible. With a 275 wolf at 170 playing against profs like crat/engi/fixer/MA/advy/MP/agent sometimes, you can do enough damage without alpha that things start to look grim for them without landing a perk.