Lol, good one!
I know there are a few that are good, but they're still not going to have me working them into my attack chain. Off the top of my head, I'd like to see bow and arrow (Kelly Nemmers), Iron blade (Buck Salinger), Electromagnetic Grenades (Lars Hansen), Holy Shotgun - plus1 foes and you miss 90% of the time... with a shotgun!, (Tobias Hansen), Rune of Warding (Skipper), And for some flavor, vile of bees (Vernon)...
Take your pick...
https://archive.paragonwiki.com/wiki/Temporary_Powers