Yeah I do that too. TU is good only for people under level 116 (it's actually decent for that level in ZD/SWT until you get inferno and can go to jungle) or higher levels with really poor kit who can't kill mobs properly. Only time I use it is in bile rooms I run round and TU all the archers first before luring the rest of the room together to kill in 1 go, but there's no archers in Crystal so I really don't see it making any difference
I'm with Alan/Wicksey, TU must be enabled in CP. Zade, you TU archers that slow you down with there ranged hits, but you wouldn't TU something that will slow or freeze you? you have no logic...