This is my idea for the Electrical Shotgun.

Consumes 15 Ammunition
Incurs 10 heat penalty

Damage of 1*15 pellets minimum.
Damage of 5* 15 pellets maximum.

Deals 1*15 Electrical "DRAIN" damage.
Deals 5*15 Electrical "DRAIN" damage.

Assume Enemy Energy is at 0:
Effective Damage Range Opponent has no resistance (0 armor) (15-75)+(15-75)
Effective Damage Range Opponent has Multi-resistance (10 armor) 15-15+(15-75)
Effective Damage Range Opponent has Negative resistance (-5 armor)-->
->(15-75+75)+(15-75)

Assume Enemy Energy is at 110:
Effective Damage Range Opponent has no resistance (0 armor) (15-75)+(0)
Effective Damage Range Opponent has Multi-resistance (10 armor) 15-15+(0)
Effective Damage Range Opponent has Negative resistance (-5 armor)-->
->(15-75+75)+(0)

Total Damage=(Base Damage)+(-negative armor*Pellet Count)+(Drain Damage)
Base Damage=(Pellet Damage-Resistance level)-->Calculate this 15 times and add together.
Pellet Damage=1-5(Random number between 1-5)
Drain Damage=1-5(Random number between 1-5)*15(Pellet Count)(Bonus damage if Drain Damage is greater than Opponent's current energy)

This weapon works around the idea Shock Mechs can choose to either drain their opponents or use resistance drains to do pure shock damage. This weapon can be used at the start of the battle but their opponents will likely have full energy and resistance reducing the damage. A Heat shield can be used to mitigate the Shock damage however the drain damage is inevitable. It can also give shock mechs a way to penetrate highly armored resistance mechs through extra drain damage. (Same way Electricity should bypass and conduct through metals)

I had the idea to make the damage purely Drain damage but that would be too powerful and would ignore resistance overall. Please vote!