I'm on my second run through as a vanguard.
Tips for this:
1. Use the Carnifex Hand Cannon with level 1 cryo ammo, as this has 100% freeze rate on unarmoured/unshielded enemies.
2. Evolve Charge to Heavy to get the slo-mo effect.
3. Choose sniper training on the Collector Ship, not the Krogan shotgun, use the M-22 Eviscerator instead as it has better mid range.








