Uhhh... are you aware that facets do not add + skills? It's + x% to dmg & - x% to enemy resistence.
For example... if you put 1 pt in all prereq's to frozen orb... then 20 pts in frozen orb... the dmg would be 267-282. If a facet added +5 skills, then your new lvl 25 orb dmg would be 340-357. However, the facet actually only adds 5%, making your orb dmg really 280-296, with the enemy res beign lower and taking slightly more dmg... but not as much as +5 skills would've been.
Knowing is half the battle. :fwink