Hi Danilo!
Thanks for playing Duelo. Right now I feel that the amount of ramdomness is on a sweet point. It encourages you into spending some currency until you get a good roll and also explore the most of the map until you unlock a card/item that has the base comibation of stats that you need.
Stats on a base item doesn't change when corrupting, only can increment. So if you want to make a build that works around Absorb Damage, you can choose the path of unlocking all items/cards that grants you Absorb and increase their rank, or pick other items/cards and corrupt them until the get the Absrob stat.
In this alpha version there is only a little amount of cards and stat combination. On the full game there will be cards/items for every kind of player.