Who are the best Eddies and chars to improve with skill shards for pvp ??

I'm not included in pvp beta testing, so what are the best Eddies and toons to improve with skill shards ?


Defense:
Visions Eddie ?
Green demon ?
Prisoner ?

Attack:
Tailgunner Eddie ?
Assassin Golden Son ?

Presently def mummy Eddie, Pharaoh, prisoner, dm, red troll, hell hound ass rocket dog undead rescuer sentinel, bomber boy green corrupt rescuer gunnet and soulless demons sentinel.

Attack: gr eddie, tailgunner eddie, AOF, ags ggs, cg blue soldier

It may be a good idea to wait,
Some discussions on potential nerf still have to be made and those shards are precious...

Thank you very much !