Novice tankadin LF halp
I would not recommend it. I would not even look at my hit or expertise until the situation warrants it. I can only think of two situations:
1. You are the only interrupter available and it's critical. Like shadownova on halfus. This would be better fixed by getting a melée on him, but in 10 man, that might not be possible.
2. You are losing threat AND you have done everything possible to fix your spec and rotation. This should not really be a consideration until maybe T13-ish.
"he doens't need healing, he doesn't need healing, he doesn't nee-WHAOSHIT!wtf was that man!". Please stop leaning on TDR. -Teng