Its pretty obvious the next DPS up to bat is going to be a DoT focused caster with them pruning dots. However, it is possible there might be a physical ranged to go alongside it. It may be possible it could only be a DoT caster. I don't see another Tank coming nor another healer. Also unlikely to be a melee.

As for a ranged physical, most likely either will be a totally unique class nobody can predict or it might be along the lines of Trickster or Juggler.