+40% damage combined with up to 5 Damage Up (granted the damage up is pretty hard to consistently get but) and another 3 Damage Up and 1 Plus Coin Boost per S3 combined with his already high rolls is pretty crazy
I still don't get how grandeur works, as I understanding it should give more sinking to an enemy when it's attacked by a unit that inflicts more sinking than it already has and only if it's inside the placement order requirement, but it just does not work for me sometimes
the enemy needs to already have a certain amount of sinking on them after the attack ends for it to take effect, maybe you've just been hitting sinking-less enemies
I don't really remember, but other than the enemy needing to have sinking it might also be at turn end and not after attack, don't quote me on that though