At which level should I be using all my effigies on runecrafting? Hate the skill but don't wanna look nub with a lvl 66 skill. Im using it on prayer atm since I have nothing to use it on.

Here's a calculator that tells you how much exp a lamp will give at a given level: http://runescape.wikia.com/wiki/Dragonkin_lamp

 

It's all up to you when it's "best" to start using the lamps on RC. The best way to decide would be to figure out how much cash you save by using the lamp on prayer or herblore, and then decide how long you're willing to runecraft to make that much money. At the level where you'd make less by spending the lamp on prayer or herblore than you're willing to spend to get out of X amount of runecrafting exp, that's your level.

 

Hope that makes sense.

Not related, but it may be useful:

 

http://www.youtube.com/watch?v=nXBiOS5NpeQ