Things learned while making a nightmare born of my psychosis...
Only works once, if the buff it's removing stacks to ten, you need ten separate instances.
Yes, that's right. Two files with five instant actions, even with different delays, will only remove two copies.
It lies. Like a dog.
If you set you instant action delay time of 0 in conjunction with a 12 second arrival delay, it won't add up the same as 10 and 2.
Doing something complicated off a planet? Don't.
They don't just require passives. They break all kinds of strangely normal things even within a passive.
Use the planet based ability to trigger a nested function in a passive ability on one of the planetary defenders.
After you do this, you've escaped the purging fires of hell for a milder climate, like a crematorium. If you don't, two buffs with different functions and identical application methods just might leave you confused as to why only one of them works, and only some of the time.
If something horribly complicated that should be working isn't, check applications to the planet and make them use travel.
I'm sure I ran into more problems, but I can't think of them at the moment. My brain is fried from 90+ hours of strange problems over the last week...