duo fungi king in water at ledge? exploit or no?

[Colgate]

have personally been confronted by sirken, instructing me to tell my guild members not to pull anything to that safe island because "it's an exploit" (even though it's not) or he would start suspending people

this was after deathtouching an entire group there and removing the fungi tunic from the spore king that was up

pulling into the water where it won't cast/attack/flee is different tho i guess