I like the tradition where the Devs make mini balance patch for each Skin. Hopefully that tradition goes on. Its sometime good or bad. For Railgun its bad.
First which weapon do you think derserve a Skin/Buff/Nerf?
Boots: It's been long since this weapon had a skin.
Buff: revert the combo back to it oringal. The combos are to slow. The original combo were more fun and faster. (damage with these might need a tweak)
Nerf: Booster consume more sp. Apply Slow effect after booster wear off. Like with Lighting bomber slow effect.
Vital Shock: A really cool weapon. This one only has 1 skin I really like had more. The first one doesn't really suit my taste.
Buff:(Its cool, but to weak) Hold attack change; instead doing what it does suction> hold deal damage>Blow knock back.
(The pull while holding doing damage is the worst about Vital shock. It to slow, leave to many vulnerable opening for a attack)
Change to suction>Blast knockback which is pull target to the palm of Vital then it release one fast shock blast. Pull only target one at a time.
(a much faster attack can be adaptable in any situation)
Dash attack: Become more faster upon activated. Deal a little more damage.
Increase damage attack in combo.
Katana: Really can't say it need more skin, but overall damange need a boost.
Buff: Increase Katana combo and strong hold attack damage.
Charge attack: Faster change time.
These three are my top 3 which I consider. Don't know about you guys. We don't know when will the Devs would make a skinor any balance, but it be fun to talk about it while we wait for next patch.