This was one of the "OG OP" characters since the days of the beta, or so I've heard (along with the Salarian Infiltrator and maybe the Human Vanguard).

A few discrepancies with my take on this build:

• Ammo Choice - I may be in the minority here, but I actually prefer Phasics. Warp Ammo does no damage whatsoever to shields, which is why some of the tankier shielded mooks live through your Arc Pistol charged headshots. This sucks in particular if you end up against Geth. Phasics fixes that, and handily takes care of everything up through Phantoms. You do lose out on some damage against heavy armored units without the juicy warp damage, but you still have Warp debuff, can still do Warp + Throw BEs which is your primary source of armor damage anyway, and a piercing Arc Pistol still hits pretty hard, especially if you can land headshots. Also since there's no Acolyte, Phasics Arc Pistol is good for shredding through boss shields. You're more than welcome to run Warp Ammo against Collectors or Reapers, but for Unknown factions, I always take Phasics. Plus you probably have a ton of them laying around anyway - most people only use them for single shot snipers, which is a shame.
• Stasis Evos - I like the utility of the Bubble evo. The vulnerability evo is nice since it amps your ammo damage and can be used to reach some thresholds (like Executioner w/Phasics on Gold), but if you've got the Arc Pistol IMO there's no reason to bother with the vulernability evo at 6 - anything that can be Stasis'ed can be one-shotted regardless with Phasics Arc Pistol. Also 4b isn't really worth taking, as it's simply increasing the damage threshold on health before Stasis "breaks" and enemies slump to the ground. With this build everything should be dead, and either way you're hitting that threshold very easily with or without that evo. The 4a duration evo is nice especially when paired with the bubble evo at 6.

I also usually run 6/6/6/5/3 instead of zero fitness, full top evos for maximum force Throws (cd is so short; just Throw again if it misses), and Crutch Scanner, but those are all pretty insignificant.