I thought I'd start with proposing changes to the crafting recipes.

The platform/recharge station is made from: 1 red wire, 2 steel, 1 battery (why a battery?)
I suggest: wire (any type), 1 plastic, 2 steel, 1 FPGA circuit

T.I.T.A.N. Helm (that should be called just Helmet, a helm is something else):
It's made from 4 materials, so I'd add aluminum - the visor would be made from aluminum oxynitride, basically transparent aluminum, a cool futuristic addition to the helmet's description.

And finally, my main point, the Worm Ender (which still sonds like a BB gun)
Recipe: it should be made from 2 shotguns instead of 2 SMG's, and a piece of carbon. It fires slowly but deals lots of damage, so it's more of a shotgun-calliber coilgun that has a built-in supercapacitor (and supercapacitors are made from carbon.)
Ammunition, why not make it fire titanium bolts? Basically, you load it (1 slot) with 1 Titanium and it fires 1% or 2% each shot (for 100 ammo or 50 ammo per titanium, whatever's more balanced).
Still, a better solution would be to make titanium cartriges for the gun.