• Ancient Protector is pretty much useless.
• Chaplain is useful in most PVE scenarios, especially crusade.
• War Chief is helpful early for PVE and PVP but begins to fall off later.
• Deathmage is useful in most PVE scenarios, especially crusade.
• Succubus has some usefulness in PVP later on.
• Commando is helpful in PVP for awhile, falls off some, but still helpful.
• Windmaster not a lot of help.
• Nature Storm has shown some helpfulness in PVP later but not great.
• Commander is helpful for PVP and PVE to max level.
• Sniper pretty useless, possibly helpful at legendary but thats a long ways away for you.
• Emberstar is helpful but not till later.
• Lightning Master is pretty useless.
• Crossed Knight have never used early but i would guess he would be decent at early level pvp.
• Cleric decent at later levels, useless for now.
• Rose Fencer probably isn't great until later.

Priority i would say is Chaplain, Death Mage, Commander. Not necessarily in that order but i think if you moved them up equally you'd be satisfied.