Hey, I need an opinion, I wanna start upgrading a character to join my PVP team, I just don't know what to choose to use skill shards on. I have:

Warrior Troll
Sentinel Undead Rescuer
Assassin Golden Sun
Magus Corrupt Rescuer
Warrior Harpy
Sentinel Golden Sun
Death Dog
Angel of Pain
Magus Allied Soldier

My PVP team already includes a Masked Harpy, Holy Smokes Eddie, Warrior Golden Sun, and a Prisoner.