gotta be careful with frenzy...
don't use that near my hammer guy if you see me, you are gonna be down so fast
saw someone sneak up on me the other day while i was bashing on a mesmer...the warrior starts to use frenzy after for great justice to build up his adrenaline...bad idea ! as soon as i saw he was hitting faster, i turned around and start bashing on the poor creature who was dumb enough to use frenzy on me...first hit, 150 damage, then my adrenaline was up, 2nd hit 80 + knockdown, 3rd hit 175. dead fellow.
laughed so hard at how deadly hitting a foe with frenzy is that i almost forgot to finish up the mesmer.
but yeah, i agree, its a nice skill to have around. but with that 2x damage thing, i usually carry berserker's stance instead, if i want faster attacks.