Originally Posted by
Vold
It's only there to prevent us from using multi hit weapons then switching to better weapons for the weapon skill, but that's so 2006 to be honest. It would be utterly pointless to do it now if it could be done because you'd lose too much DPS by using a multi hit weapon. I can only really think of one useful thing with multi hit weapons these days and that's while out solo or low man without seriously buffed DPS.
So, for example I'll use my kraken club in my offhand if I'm not buffed beyond haste spell or 2x march. With all the bells and whistles I waste my damage potential using the club. I'm better off with a single hit weapon for offhand. And as far as 2h weapons go it's the same story. If I could switch weapons without losing TP I'd use my ancient sea GA because it has a great proc rate then switch over to serious business for weapon skills, but I'd never ever try it when buffed for glory.