So, I'm looking at numbers for power damage and see this
Master Overload - 150 damage in 10m radius, 30% vulnerability to damage for 10 seconds
Master Sabotage - 150 damage in 10m radius + 4 DPS for 25 seconds
Master Damping - 100 damage in 10m radius, stun for 3 seconds
Operative last rank - boosts Sabotage radius by 2m, damage by 50, DPS by 1, duration by 5 seconds
Thus: Master Sabotage - 200 damage in 12m radius + 5 DPS for 30 seconds
Spectre Training rank 9 - Increases the damage and duration of all powers by 5%
In the end:
Master Overload - 157.5 damage in 10m radius, 30% vulnerability to damage for 10 seconds
Master Sabotage - 210 damage in 12m radius + 5 DPS for 31.5 seconds
Master Damping - 105 damage in 10m radius, stun for 3 seconds
Using Overload first
Immediate damage:
157.5 + 210*1.3 + 105*1.3 = 567
Damage over time:
6.5 for 31.5 seconds = 204,75
Considering RedCaesar97's numbers about recharge speed I will be able to deal 567 damage every 6-10 seconds and have DPS from Sabotage added to that.
Edit: As a comparison, HMWSR Master Sniper Rifle X deals 336 damage per shot, 756 with Master Assassination.
That seems quite a lot, considering I also have squadmates dealing damage. What do you think?