Just stating what some folks may already know. The +50 spell interrupt resistance is really unique and give the lucky WHM a really good opportunity to make a (situationally useful) awesome weapon.

If you think about when it would be best to use a stat like that, the princess fight immediately comes to mind, or any other fight with a ton of adds that it may not be the best strat to have a WAR tank them. That being the case, what spell would you use in such an instance? Personally, I like stoneskin in that scenario. So the best thing I could do to buff stoneskin is to meld some VIT onto a weapon, enter the skirmish weapon. With that, you could have a weapon that will be the best in certain situations for years down the road.