What if pillars had a stacking debuff in a small radius around them, once you hit a certain stack then an effect will trigger, things like a dot, mana drain, or even a knock back/Silence. This would make to so that Pillars are usable to avoid damage or CC short term, but makes sure people do not live around pillars.
So something like the pillars have a 5yrd zone round them ever 2s you are around them you get a debuff for 15s after 5 stacks it starts draining mana for healer roles increasing per stack and a dot for damage and tank roles. If you are way from the pillar for 15s the stacks decay.
I can see issues with the idea, but I can also see ways to make it work.
Just a thought.