Also of note, if you're Spell Speed is getting too high for your mana, you might look at choosing to not use some of the Scaevan gear and instead use some of the pieces from the 24-man raid.

For example, the healer hat from the Monastery doesn't have spell speed while the Scaevan one does, same with the gloves. Also the Ivalician pants have less spell speed than the Scaevan ones. You will give up a little main stat, but sometimes a lower item level piece of gear is actually superior to the higher one.