Rival wings issue

[Bacent]

Example: if a player has regen and medica II already in effect then they cannot receive a diurnal aspected helios or even an adloquium

https://na.finalfantasyxiv.com/jobguide/pvp/

You can only have 1 type of regen on you at a time. So if another whm on your team uses regen, or even an ast regen, it overwrites your own. They do not stack. Also Medica II isn't usable in PvP