Shieldbreaker is an amazing class that can be top-tier at everything.Even as a melee build as it turned out. Res are honestly not that hard to fix on a Shieldbreaker, itemization is just insane for this class. Offensive power is monstrous and for defenses you have a very effective combo of Blast Shield/Resilience/Ascension that together with Ghoul and Prismatic Diamond make your Shieldbreaker extremely tough.