I've been trying to figure out the imbue enhancements for elven arcane archers. I've been using this page. http://ddowiki.com/page/Arcane_Archer_enhancements
What exactly are the requirements to use the imbues? Using "Imbue Force Arrows", it says minimum ranger level 6, but it also says there's a cooldown of the force missiles spell. Does that mean I'm required to have magic missile (which effectively means at least a 1 level wizard/sorcerer splash)? Or is it just misleading and I only need to have the available spell points and enhancement?