I will do it with RFL debuff, I tried Scanner Boss and team always dies when boss is like 5% life -__- Most of the times, tank losses agro and begin to attack the rest of the team, at last, team fails...
Some say that you should interrupt that love you before she transformed into demon, but for me, it's easier to kill the love you when she's in demon form. She seldom summon a healer there. But your Mage should interrupt her every after lightning strikes.
Its easier for tank if he use double shieldslap buff,at first mop strike/s. Slap,second mop cs and 3 again strike/s. Slap + stance if there appears a heal war or milli have to kill heal fast never did it with mage and arch when heal appears