Board Thread:Guides/@comment-34263638-20180109124901/@comment-78.45.135.244-20190120194840

As typed, upgrading your equipment against boss is really good, if you full upgrade weapon, helm and armor (ranged weapons and magic is not necessary) then all bosses will be pretty easy and you'll get bonus gems for achievements to defeat demons without losing a single round.

And never understimate challenger. Always save up minimally to buy weapon, armor and helm, so you'll not end like me, i had idea that i can defeat Fisher only with Glaive and Shadow Armor (i was challenged at level 23) without Silver Kabuto, this fail forced me to spend 49 gems (46 to buy Silver Kabuto for gems, because i've not saved money for it and 3 to rematch after losing at insane) to get Wanderer's Staff.