Why don't astro cards stack?

[Killersai]

Ironically, regens do stack, all of them.
WHM and AST, two WHMs, or two ASTs, you can stack all their regens.

that's good then. they should stack if they're all coming from multiple players. i don't see why they shouldn't. arguing that they would be OP is a bad response that only gives credit to lazy developers. I can understand not allowing buffs to stack as a design choice such as having astros be designed to fulfill a counterpart to regen or shielding when paired with a white mage or scholar respectively but simply not allowing buffs to stack with each other "cuz they be op" is a poor and lazy design choice that defeats the purpose of grouping up.