Offering Items to Valkyries

[sethmage]

just to understand that donation thing.
from level 1 to 2 you need 1 item of any level
from level 2 to 3 two items (any level items or they have to be level 3 or more?)
same with from 3 to 4, i take it you need 3 or 4 higher level items or doesn't matter?

i read somwhere that you need donate higher level items that your valkyrie is, could somebody confirm that?