Shield/Psionic Melee here, it's my main. Both sets having a damage buff is nice as it elevates you beyond the minimum damage tanks. Not only that but shield's damage buff really helps make mass levitate a decent attack as otherwise its a bit weaker for a tier 9. Other than that the only other synergy (gameplay wise) is if you shield charge in, wait a second then mass levitate mobs you can keep them on their arses for a good while. Theme wise the psi blades go well with the shield.