What is your preference for playing? range, magic, or melee? Every strategy is different depending on what you have or what your build is. For example, I have a powerful ranger that I use splitting arrow, poison arrow and explosive shot most of the time while jumping around the room and rolling behind obstacles. Granted my dmg was overpowered at this point and I could have just stood there and kill each mob with 1 Explosive shot but that wouldn't be fun at all.
Could U give an outline of your stats and skills? Perhaps that would help to narrow a strategy that would work for you.
Regardless of your class, you should notice there are places for you to lead them in smaller numbers (both on the back right and left side) and kill them off one at a time if all else fails. Just remember you do have that mage who will heal Zandala if he gets really low on health. Always be on the move! Remember to pull enemies of them once in awhile. I would try casting your 2 pets near the wizards so they offer some defense before reaching the mages. If the crowd gets overwhelming, try using a CC skill like fear, mind control, or stun arrow.
