The 2 mages did a few mistakes... 1st why cast arcane missiles on a pally thats casting holy light instead of counter spell, 2nd why polymorph a dotted target? sure it stops them for 1 sec or so but during that it resotores like 5% hp to them and 3rd, why not frost nova after blessing of freedom ends as it needs 10 secs or so to be used again...
and further more you have that lame Twin Blades of Azzinoth wep, try the same with a REAL weapon instead of that.