When we examine both videos however ... the barb is being healed and buffed by the bard... initial buffing the bard farther down in mana to start than the arcane's intial buffing. In fact a good potion of mana on both videos ... was the buffing. The bard doubly-dipped because he had to provide not just for the barb but also himself. Simple a non-blue bar in group costs you blue-bar.
Then we examine healing. The bard also scroll healed the barb... and inter-mixed cures draining the bards SP pool to a couple 100sp left? Least what looks like. Thus the cost for killing that mob via a Barb actually was far more than the costs involved for the arcane to kill it when I think about this. It's 'bout 1kpp in otc goods (artificial mana) to actual heal the barb ... the arcane spent zero pp and no sp on healing.
It is silly thinking the barb's DPS costs NO mana in fact being he costs commodities (scrolls) - bought mana - too.
It's a pure fact ... that both videos were not about proving anything beyond the facts that arcane exceed melee in DPS .... the caster was all out and the melee was all out. What is not pointed out is sp per dead mob - Casters do everything quicker and to be honest more efficient... What's more the arcane can easily utilize sp recharging items to continue onward to the shrine ... the bard may do so also but is actually more taxed because he must - provide for two people, he and the barb. He has to turn his Blue-bar and scrolls into dead mob and is using a melee to accomplish this.
NOW... if the bard were smart he would have grouped with the arcane instead of the barb and would be a SS rather than a chanter... the bard could cast some intial buffs allowing the caster to start closer to full ... the caster takes down the mob and has a little more mana to spare at the end of the fight and the bard may vigor him some to help replenish SP back quicker... the two go on and utilize even far less resources throughout the quest. The barb in his picture dies because the bard is not there, releases and sits out the game in Amrath his bind point.