Why would it ruin supports? an active support will ALWAYS be better than a box support lol. if you want to go pvp/siege with box sws/bd/ol/ee good luck winning any pvp LOL. dual box is fine so you can solo + buff, so you dont ALWAYS need some1 else to xp, but high lvl AoE parties/instances/raids/pvp is always better to have actives. on RPG x3 dual box is alowed and let me tell you there is A LOT of active supports.