In the current state of the game Jacques is overpowered. He can literally kill half of your armies within seconds of the battle starting. There isn’t much else to be said about him, he costs three energy to deploy but honestly it is worth it just because when you do field him you are almost certainly going to win.

Walking Arsenal (costs 3 energy)
While seemingly invincible during battle, the mech that Jacques pilots also expends a large amount of Energy.

Fire Storm
Jacques increases his machine gun’s rate of fire 2-fold for X seconds, devastating enemies in the line of fire, each bullet dealing an extra X points of damage. If Jacques runs out of ammunition, the ability automatically comes to a halt.
This skill is outstandingly strong and doesn’t cost any energy, realistically it should cost 1 but Jacques has a deployment cost of 3 so you could say this spell cost is built into the deployment.

Rocket Launcher
After lots of tinkering, Jacques finally outfitted his mech suit with a rocket launcher. Jacques fires 1 rocket, dealing X damage to enemies near the blast.
Same as the skill above.

Mech Expert
Jacques is an expert at making careful modifications to Mechs. When he is on the battlefield, all allied Mechsuits, Mechwalkers, and Battlemechs have their damage and max hit points increased by X%.
Anything that helps keep those expensive mechs alive.

Expanded Capacity
In order to improve the sustained firepower of mech units, Jacques increases their ammo capacity by X%.
This and Grimms ammo capacity abilities stack which is huge.

Double Charge
After lots of tinkering, Jacques finally outfitted his mech suit with a Double Charge Cannon that shoots a blast of shrapnel, dealing an extra X damage to nearby enemies struck.
Damage, damage and more damage.

Spray and Pray (costs 1 energy)
Jacques overloads the systems of his mech, increasing fire rate of all weapons by X%. Ability will stop if out of ammo.
This ability, oh boy do you like watching armies die instantly? Do you want to win every battle at the low cost of one energy potion per battle? Then this is the skill for you, push this Button and watch your enemy rack up a week long repair bill.

Building Jacques
Fire Storm and Spray and Pray is all you need.

Equipping Jacques
As much might as you can find.