Aside from Sam/Maybe Blade: To hybrid WS I'm fairly certain their really isn't another elemental WS that's multihit (I'm not counting Atonement since that is modded by Enmity).

SE already stated they have no intention of fixing Requiescat's Attack penalty so I'm not holding my breath out for that.

Although it would be fairly rare I would prefer a strong physical WS with Murgleis to benefit from the Occaisonally attacks 2-3 times effect.