The Level 50 Yellow Shield would be highly recommended, but if you are unable to make it, then go with the 50 Orange shield. It's called Lord of Cruelty It's stats are:
+ 28% chance to block
When equipped, malice caused by damage inflicted +10%
10% chance to activate weapon abillity when attacking
Ability: Chance of dealing a physical critical hit +100%
Lasts 10 sec.
As for hammer, same thing. Don't hang around blues too much at 50+. Try and get your sprite to make you yellow hammers/shields. ^^