You will need a max of 176 strength to hold melee weapons. Advantages include higher attack than the Fire spell and the ability to own fire taos and archers if you can catch them. Obviously you'll want dragon gems. And for melee you're gonna need to dump all the mana you can spare for HP. I'd keep maybe 2000 mana to rev and stig.
As for the choice of weapon, just compare the stats of each, and also their skills. Fixed Speed Gun is awesome when it activates and you have a good spear, so imho thats best for pvp with a 2h wep. And Mehk is right...blades are a lot of fun.