Battle of degeneracy, whose execution should be more merciful?
Honestly, probably Pie. The stuff he's come up with has been disgusting, but it's a narrow scope, and he's only been spreading/bathing in it for a year or two.
Tenshi tries harder and posts a wider variety of stuff, and is almost continuously trying to remind every one that he's a perv or love pest. And he's been up to it for years.
It's not exactly a big difference, but if only one of the two were to permanently leave, I'd rather it be Tenshi.