this build stacks 60% extra attackspeed and uses chaingun for an extra 40% dmg with biotic bullseye to help keep up on the ammo which also gets a 65% increase. Note: using man on the run instead of super visor or on me! does work to keep you loaded up between fights

Item purchase order

Round 1

While continuously shooting [Pulse Rifle], each shot grants 0.4% Weapon Power, stacking up to 100 times.

5% Weapon Power

5% Attack Speed

10% Weapon Lifesteal

Round 2

Sell

5% Attack Speed

5% Attack Speed

25% Max Ammo

Round 3

After using [Helix Rocket], activate [Tactical Visor] for 0.5s.

5% Attack Speed

5% Cooldown Reduction

When you use [Helix Rocket], restore 20% of your ammo.

5% Attack Speed

Round 4

Sell

5% Weapon Power

10% Attack Speed

5% Move Speed

5% Weapon Power

After dealing damage to Shields or Armor, gain 15% Attack Speed for 1s.

Round 5

While in [Biotic Field], critical hits restore 10% Max Ammo and extend the duration of [Biotic Field] by 0.5s, up to 5s.

Sell

5% Attack Speed

Sell

10% Weapon Lifesteal

15% Weapon Power

10% Attack Speed

40% Max Ammo

When you use an ability, restore 10% of your Max Ammo.

Round 6

Sell

10% Attack Speed

5% Move Speed

20% Attack Speed

When you use an ability, gain 10% Move Speed for 2s.

Round 7

[Biotic Field] moves with you and grants you 20% increased Max Life while active.

Sell

15% Weapon Power

Sell

5% Weapon Power

After dealing damage to Shields or Armor, gain 15% Attack Speed for 1s.

10% Attack Speed

30% Increased Damage to Barriers

Dealing Weapon Damage to Barriers has a 50% chance to restore 1 ammo.

10% Attack Speed

Deal 5% increased Weapon Damage for every 100 Max Life the target has more than you, up to 20%.

Heroes