Originally Posted by Fat rekt
focus punch regice lead>
The only reason specially offensive stuff like Gar run FP is because its a relatively decent Bliss/Lax/Regice lure. Regice, unfortunately, simply doesn't have the offensive investment to spare to make it worthwile to do so, since its a special wall, not a sweeper. You're pretty much obligated to stuff 252 EVs into HP at the very least, so offensive investment is limited and not worth it.
On a side note, I got bored and decided to test out a wallbreaker Shiftry which also serves as a TTar lure. So far, its performed okayish, but I need more testing.
Additionally, I'd like to point out that Flygon is an excellent Swampert lure and yet it has access to Giga Drain. I think it certainly has a place in a few sets.