Well, I never tried fan but, the pipe is definately broken as helll you could easily grind bears at lv 10, which also gives xp. I Tested it with an alt of mine and as long as they dont have a flicker+hit at the same time move, they are easily farmed. I even managed to play around with the Kuraken, if u only move diagonally u wont get hit and if u only focus on the Pipe's auto attack, you could even defeat at least a tentacle at lv 10 (just takes time). What i could'nt confirm is if even a tentacle gives xp.
So yeah, the pipe does need a nerf.