Chance to cast on striking gain Synergy Bonus?

[evileye]

Ok reason I am posting this is because i have a Windhammer ogre maul which gives a 33% chance to cast a level 22 twister on striking.

This can reach a 8 / 5 fury on a werewolf druid, which mean it can be hitting pretty fast and casting that twister quite often.

So I was wondering if I also maxed tornado and hurricane if the twister from windhammer would do more damage because of the synergy bonus.