With a Tome and a good build, You can achieve about 900-1K crits@ 190 Attackspeed.
Couple that with your Autocastbolts, endow, and "other" elemental Spamming, And you should be able to kill him/her.
Not to mention, Yeah - LP, Burn, and Soul Exchange.
WOF Also Gives resistance from Boomer, and chain damage, And will make Shield Charge miss quite often.