I am glad that you asked this question, of course you should know that gem and enchants play a HUGE role in the healing world of World of Warcraft. What I do with my main (Resto Druid) is very complex. With blue gems i got for the spell power and spirit. Red the spellpower. Yellow i believe it is the spellpower and intellect, i also know there is one yellow gem that is spellpower with haste but I only suggest using that specific gem if your are low on the haste cap. with enchants on other gear I suggest you get the cape enchanted with haste and everything else with the highest spellpower enchant as possible, but with your boots get the spirit enchant. YOU NEVER WANT TO STACK ONE STAT, NEVER! Please post something if anything is not clear! I hope this helps you out a little bit.