First sorry i'm a noob, And i was wondering is it just me or do higher units level faster? Ranked up my giovanni from 23 to 50 in just two training sessions by combining him with two level 15s of himself each with 3 silver fairys

so should i be not only leveling golds to 30 and evolving them but also then leveling them to 30 again and sticking 3 gold fairys with them to get my unit capped? because if my math is right that would be way more than an xp armor

Keep doing this?