If you could design a kit for MP, what would it look like?

Combat Sapper

Barricade
Barricade
Barricade
Offensive Tech
Support Systems

You could spec one for offense and one for defense, and then leave the third at one point because Barricade sucks.

I like the idea of a unique passive that allows for more than one active pet.

Was thinking something like...

Mech Master (could be Human or Quarian if there ever added, also I couldn't think of a better name lol)

Combat Drone (returning power from ME3)

Invasion

Overload

Drone Overlord (Adds the defensive drone from the Engineering Profile from the single player, bonuses that gives both power and construct damage bonuses, and one of the rank 6 evo's will allow you to deploy 2 combat drones for a total of 3 on the field)

Support Systems (same as Human Engineer)

I thought about it before posting and it is very nice as well. But I think I'd prefer Reave: instantly hitting from a distance, priming multiple enemies with the radius evo and granting damage redution. You can then: reave from a distance to prime > charge and explode > prime again instantly with annihilation field and > either charge again or reave. Reave would be a primer and detonator by the way. Oh and this kit also has a unique passive tree with additional movement speed. And a special melee weapon (thinking of some fast assassin blades). 
 

Human Kineticist 2.0 with Charge, Annihilation and Shockwave.

Are you denying netcode overload exists?... Billy, is that you?

Billy is also classified as NSA: no such account...

It would look like this:

Human Explorer

Turbocharge
Tactical Cloak
Charge
Munitions Training
Barrier

Krogan Commando (fuck it, Uncommon)
Stealth Grid
Flak Cannon
Annihilation Field
Munitions Training
Rage

Turian Grenadier (Rare)
Frag Grenades
Sticky Grenades
Inferno Grenades
Munitions Training
Combat Fitness

Angaran Sapper (Common, fuck you BW)
Snap Freeze
Invasion
Overload
Offensive Tech
Support Systems

Asari Soldier (Ultra Super Mega Rare)
Singularity
Warp
Turbocharge
Munitions Training
Barrier

Adhis (Outlaws) don't cloak and don't spit green stuff. I think you mean the Wraiths (Kett)

The non-kett version is called a Challyrion