Idea is mainly for pvp but you can also use on pve for boss fights.
Ideal is so loads do u want to be mercenary yes. Then quest comes someone on a server to hire mercenary.
Based resources they dump into call determine the lvl and gear Then after fights is over you can transfer your merc to any server u want. If transfer then all gear and stuff on merc goes in chest that you can pic up at relic hunters place.