Evolving item exp

I'm trying to evolve my clicky resist mask. So far all I can say is the exp is insanely low.
Do evolving items level like normal exp or is it number of kills? Do I need to AE LBs to evolve this thing? Anyone know?
Do evolving items level like normal exp or is it number of kills? Do I need to AE LBs to evolve this thing? Anyone know?