What for? This game has a lot of problems, but ammo isn't really one of them. I routinely have more power ammo than I know what to do with. Kinetic and Energy ammo is pretty easy to get a hold of as long as you're utilizing both weapons. Seems like Kinetic ammo drops more when you're using an Energy weapon and vice versa. If you only use your Kinetic weapon then you'll probably run out of ammo for it once in awhile. Still not necessary to bring synths back because of that. Synths had that dumb 5 minute timer and they force you to open up your menu, which takes you out of the fight. Plus synths just encouraged people to wait 5 minutes after each wipe in a raid so they could get their heavy back. And honestly one of the most annoying parts of raiding in the last game were the people that made you wait 5 minutes for heavy ammo, and then they'd screw up within a couple minutes and we'd have to wipe and play the waiting game yet again.