After playing the Rit in the FPE and a bit of PvE and PvP this last couple of days I would say the Rit plays the role of backline protection for the squishys.

The pre-made Rit for pvp that I used last night for a couple of alliance battles seemed to be very well suited to backilne protection with 1 spirit to knockdown, 1 to keep the foe down a little longer, 1 to steal health and 1 giving constant damage to an enemy. But all the spirits only appear to attack 1 person at a time so they only really good for those times a warrior or an assassin get through to the back.

If only I could remember all the skills that I used during the FPE, all I can remember was that it was 1 of the premades and I changed about 3 skills and turned it into an assassin muncher

Another role the Rit could fill is Air Spiker assist with skills like Rupture soul

I need to unlock a load more skills before I use the Rit in PvP again