Ezreal question, Triforce vs iceborn

Ok I am making a build for Ezreal and a lot of people suggest ice born gauntlet in online guides but I think the triforce would be better now that it doesn't give crit, opinions? The build so far: Muramana, one of the last wisper upgrades (Depends on enemies), Duskblade, cooldown boots, blade of the ruined king. Also is blade worth getting on ezreal? Or should I go bloodthirster?