Necessary changes:

Supernovas: Require 20 bullets per use.

Engine Breaker: Increase weight from 57 to 72.

Regeneration Blocker: Decrease weight from 82 to 74

Rino Boots: Increase damage from 80 to 85, increase weight from 56 to 61.

Steel Tractors: Increase damage from 60 to 80, decrease weight from 59 to 53.

Burning/Lightning Tractors: Increase heat/energy damage from 45 to 50, decrease weight from 72 to 63.

Death Punches: Increase weights from 61 and 63 to 69 and 73.

Mayhem Batteries:
Mark I: 52-71 to 57-77 damage, 31 to 35 heat damage
Mark II: 53-73 to 63-82 damage, 33 to 37 heat damage
Mark III: 54-75 to 66-84 damage, 34 to 39 heat damage

Needle Blasters & Demolishers:
Mark I: Generate 12 heat per use.
Mark II: Generate 15 heat per use.
Mark III (demolisher): Generate 15 heat per use.

Electricon: Increase damage from 30-42 to 33-45.
Sector Eye: Increase damage from 40 to 35-50.

That's it.

Hmmmm well idk
I think the dev should add energy ammunition called energy charges that would be used by Super Novas top weapon (love the torso of same name! xD)
The Rino Boots is lighter 3 kg than Quake Feet legendary legs.
Also, i dont really think NB and DMs have that high heat generation
Electricon needs 24 energy consume and 5 heat generation instead of bullets i think

There's already a thread suggesting energy charges as ammo.

Yeah energy charges suggestion was King Spikey's

Thanks Alexander for getting me my account suspension ended.(Actually the ban was many months ago xD)

Anyways there are my ideas on balancing

Lava Scope
408 HP (just like heat equalivent for ultraspade)

Rino Boots
85 Physical Damage

Death Punches
25 Rockets used

Super Nova
use 25 whatever ammo

Electricon Mark I
26 energy consume

Antares
10 bullet consume
10 energy consume
7 heat generate

Triple Laser Pointer
6 energy usage instead of 5

Blue Angel
23 energy usage

Oh the sector eye use 5 rocket now and 14 heat generate without energy usage right?

There will ALWAYS be one, two or three setups, which are the strongest

If you lower the strength of weapons OTHER weapons will be the best option

A 100 % balance in a game / of weapons is not possible

Only way would be ... we ALL play with the exactly same mech, same fusion, same equipment, and that would be MORE than boring

Lol... you'll find out why I find this hilarious eventually...

Heh, i just want that Death Punch and Super Nova was in same class so that DP can beat SN but SN can beat DP more easily lol

How about cranking the heat down on mythical heat weapons. They make a heat battle extremely difficult. Crank down the heat but add some more damage to them to make up for the loss of heat. For the heat mythicals that already do more than 90 damage, keep it the same. I hope this helps.
Cheers
-Dangerous Victim

Another thing, make the yoshimo blade and the meltdown heavier.