Why is fire lame? Because everyone see's it as a little lackluster and weak.
Why is Zerker'ing good? Because it's simple fun and does more damage than the other spells.
Why are people going water/fire? people generally make enu's to drop items so water/fire. Water is usually the first choice but the way this game works it's hard to go single element. Zerker doesnt really meld well our other elements so fire is the easy choice. Works the other way around too. Having said that I've seen plenty earth/water or earth/fire and a few tri's that do great.
Why is forums dead? It's the enu's forums that's dead