Well imo u you need mages if u are low levels to burst sd's. Team should look like ek to block, 1 rp is max and rest mages.
Rp need attack by arrows and sd's. :D
Tactic is simple all the time sd's just when u reach stage with Wisdom of Urmahlullu keep attack by wave's ue's, if u want ek can switch weapon its up to him but ofc it would be helpfull helpful for team mates to defeat boss.