I am levelling a prot pally for the first time, just about to hit 60. I have tested several weapons, but am now using the BoA, Devout Aurastone Hammer as a Tank wep. At level 59, the tooltip says that this wep adds 140 spell power, and the weapon DPS stat is at least as large as any one hand wep I have found that I can use. The "Touched by the Light" talent says that Strength converts to SP at a 60% rate, and at this level it is hard to find a weapon that has more than 20 STR, which TbtL would convert to 12 SP. So, my trade- off between SP and STR right now is to give up 20 STR on my wep in exchange for 128 SP, and the SP seems to be winning out for me in the damage. I am almost always top DPS in my LFD groups.

So, am I crazy to be using a SP weapon to tank ? Seems like the Sp vs STR tradeoff makes a SP wep a clear winner, the TbtL STR conversion seems way too weak to me.