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Last time i play him was 2 hours before comment. Melter with right mods is far, far superior then any unit. Its pretty easy to have 5 stacks all the time, epsecially vs AI. Yes, you can kill him with few 30 damage nukes, but it true about any over unit.
Look how hard for over spacers to have 5 stacks of fervor all the time, and all that melter need is got shot. 1 early melter in your army = easy map clear at very least. And this is already huge.
I wont lie - so far i didnt test it vs human player, but at least hardest AI suck vs him. Especially if you got him early and rush after - low tier units, even with good mods, just get rekt.
No tier 3 or tier 4 unit in this situation can do the same.

@Chikanuk

Are you using the latest version? I would agree with your assessment for the release version. However, the Melter got hard nerfed recently. Currently if you literally throw the Melter into auto-combat against a very very weak stack (4-stack of 3 T1 + 1 T2 starting marauders) it will die horribly, taking out 1-2 units tops. My thought on its current balance is that against a human player it's within the ballpark, you can use status effects, ranged superiority, shields, etc to deal with it. Against an AI I think it's potentially strong, maybe needing a bit more of a hp/armor nerf given that it's strong against focus fire.

Not sure about over units yet, but melter feels way to powerful - this is already pretty good unit which now ALWAYS have max 5 stacks of fervor. So unless you somehow 1shot this already beafy guy he become most powerful combatant in whole game. Both in term of tankiness and damage. And on top of that - he will revive with 30 hp if you somehow manage to kill him quickly.
In neutral stacks this units is a nightmare and in hands of player (especially human one) they are literally one man army.

Maybe you rework him a little? So his passive instead of stacking fervor will give him (for example) armor with each hit for 1 round? But revive will still consume fervor.
With this changes it will be harder for him to solo entire neutral stack, imho.

Agree with "not dying part psychotic Revelry seems a bit strong," seems OP

Love it, but the not dying part psychotic Revelry seems a bit strong, espcially because the other buffs grant damage resistance.

As always, another quality, well-thought-out tweak to the game. Very cool!

yes.. you are right... :)

@Chaoz
The point of the mod is to make the Spacers less boring! It's harder to make interesting NPC factions more interesting.

@Yorick
Thanks! I'm glad you're enjoying them.

I am a simple dude, i see RR's mod i press Like!

Really good idea.. but the spacer units is (for me) one of the most boring dwelling breeds... i love the psifishs and autonoms.. :)