http://www.wowwiki.com/Rake <- all about Rake
http://www.wowwiki.com/Rip <- all about Rip
Both pages have exact formulas for AP <-> damage scaling of Rip and Rake.
Why Rake is believed to be a waste of energy?
- It deals less than Claw on almost any mob except really well armored ones.
- Costs 5 energy points less (b'cause it deals less), but unless you're planning to use it again (and waste it's DOT, which means... waste of energy) or use Ferocious Bite (which costs 35 but is usually a bad move, but answering "why" is for another thread unless you ask here...) you have nothing to do with the 5 points... which kinda suxx. Well that unless the fight is so long that you can use rake again, but then again - you are either a) dieing because you're wasting your time on the mob with Rakes or b) someone else is tanking that elite, in which case you should ask yourself "why the hell am I not using shred instead of thinking bout Rakes?".
Where Rake can be used to a good effect?
- Against Rogues so they don't stay in stealth should they try to get into it (but still it's kinda meh, because you have a 45 sec no-stealthing-u-****** debuff called Faerie Fire)
- For building up combo points on really well armored targets, where Claw just can't do anything near the definition of "serious damage". In such cases Rake allows you to bleed the target, with some initial damage (which can crit giving you extra CP <primal fury required> and which, like the skill's dot bleed damage, is buffed by Mangle). Second, it allows for a Faster 5CP Rip, because 4 Rakes = 4 times 5 duty-free Energy points = 20 Energy = 1 Energy tick = 2 seconds in Favor of that Rip. It isn't usually worth it though, unless you're at lvl 66 trying to punch that lvl 70 Warrior... from the front... for some reason... meh.
Edited, Oct 13th 2007 10:37pm by XanNerull