Fort your armor to +7 or more depending how much gold you have. The next blue shield should be at lvl 56. Get the 60 yellow hammer and shield they will add a lot more defense with all the extra vit and they can be useful at higher levels too. The vit mastery will add some def (recommend during them at 58 or 60 by aoeing all the bats in wcm should be a video on it, you u can duo with someone; mec and msmf work too), you don't get the defense mastery, like most classes, till 75. And for sprites the 56 hammer sprite, porpotter, drops from pip mobs (Double-Chomper Lizard, One-Horned Dragon Whelp, Night Pirate Guard, Nighthawk Owl, Masked Goblin Necromancer), it's a rare drop though good luck finding. And the only shield sprites around that lvl are lvl 51 or 66. Oh, and get the +400 def pot form jale (36k fame) and the 10/12% pdef sprite emblem.