Frontlines is ruined by exploits, SE need to fix it

[Geologo]

Issues = Stacking of healers in Frontlines
Possible solution = Focusing one healer
Focusing one healer = other healers being free to do as they wish
Free healers = heals the healer being focused.

Solution deemed a failure. Try again.

As SCH sometimes I receive a lot of attacks but I'm totally terrified by FLARE.
It can lower your HP almost to half of your maximum,
other healer can heal but god, if 3 dps will hit almost together that healer will die
really fast, also 1 player has anyway to AoE healers, just to interrupt some cast.

I noticed that usually 2 or 3 player focus a random player and not the marked, THAT
is the problem XD