Runeglaive needs a nerf so that the AP spellblade doesn't crit.
I just tested in a custom game as Hybrid Rengar, and I will tell you this was not pretty.
Had 290 AD and a little over 300 AP, crit the enemy Nasus(was testing as well) for 1.3k in magic damage.
He was doing 1.5k magic damage Q's to me.
Runeglaive needs to either be changed for bonus damage to stay physical, or not crit, this shit is going to be insane o.O