It crashes at 7
Oh good.
On the other hand it hardly seems worth using up the space just for pure HoT effects. They could be made entirely virtual easy enough since they only do one thing, and then we could make as many of them stack as we wanted, however we wanted. The only downside would be the lack of bluish icon in the bard box to reassure the tank or the cleric or druid or paladin who just did a group HoT. Although probably not worth doing since we wouldn't make good use of it anyway. And this clicky would still be in limbo since it's more than a pure HoT.