If you like Dervish then you will like the War, but you should try all the proffs as they each give you a nice change of pace in play style.
It will also give you some insight into the skills for each class.
A Dervish/ele does have several means of interupting, Shock, Meteor both cause knockdowns and Lightning Javelin interupts attcking foes.
I'd sugest that if you like the damage dealing aspect of melee chars but want a change make a Ranger. They deal nice damage, have a pet and can control a battle with calls/interupts/conditions/traps.
Enjoy
