Yeah they're basically a hammerdin, except more resistable, 1/2 the damage, and with cyclone armour and sage instead of holy shield and conc. On the other hand a reaper's toll on your merc means you can buff your damage unlike a hdin. Lightning fury is a comparison with absolutely no value whatsoever. Windy's are good in pvm, not quite up there with the javazons, light sorcs and hdins but still in the second top tier I'd say with necro summoners, trapsins, fire sorcs, etc.