Idols
The main idols for comparison are [Everbloom Idol], the [Idol of the Raven Goddess] and the [Idol of Terror]. All other idols are pretty sub-par, mainly because of switching an idol in combat causing the loss of a white attack (reset of the swing timer) which is a lot more damage than an idol swap will gain within a short period of time.
Idol of the Raven Goddess gives +0.9% crit to everyone in the party. Assuming an average person in your party does 1500 DPS with a direct 1%crit->1% damage ratio (which isn't far off), it's a gain of ~13.5DPS per member of your group, or 54 DPS + your own gain (more likely to be 12-13 or so). Remember that it's ~13.5DPS per physical DPS member of your group! Still, you only need 2 other physical DPS people in your group for the Idol of the Raven Goddess to come out as the best idol for RDPS.
Everbloom idol is 88 damage per shred. Assuming you shred once per 4 seconds (general average based on using some energy for mangles/rips, losing some through dodges/etc), that gives 25-30 DPS factoring in crits and armour reduction and everything else.
The Idol of Terror is another easily available idol from Heroic badges, and is almost as good for personal DPS as the Everbloom but is also useful for tanking. Personal preference again prevails, so some people use the Everbloom and some the Terror. The disadvantage of the Terror is that it is chance based, although it does have a very high % chance, so it's always possible to get very low uptime on a fight which may make it look bad in comparison to the Everbloom.
You should always use the Idol of the Raven Goddess if in a tank/melee/hunter group with more than 2 other physical DPS. If you aren't in a group with other physical DPSers, using the Idol of Terror or Everbloom Idol is more of a personal choice than a pure DPS choice.
