Panacea, Miracle, Numina's. That should solve all of your Endurance problems.
as for health on something that doesn't have a heal, you have a couple options. On Shield, you're probably going to build for capped def and high resist, so the occasional green candy is your best friend. That plus Rebirth can keep you plenty healed. Since Shield gives +damage with Against All Odds, you can rely on Melee hybrid instead of Assault for more resistance and regeneration. If you've got capped defense, you're not going to be taking *that* much damage, so those things should be more than enough.