Originally Posted by
Selverein
Further expanding.
Being behind the boss is nice but all melee classes should stay behind a boss anyway. Doesn't change that we'd need the same 8% hit and 6.5% exp caps so our attacks always land.
There are 2 main reasons why we do not "need" hit or exp caps to do solid DPS.
First, we're a resource-limited class/spec rather than a GCD-limited class/spec. In the latter case (Mage or whatever) one way to increase one's own deeps is to use every GCD to maximize the number of spells cast in amount of time X (spells that land, that is). We, however, will always end up being energy starved and waiting on regen so having to recast a spell is no big deal. As mentioned, 80% of the spell's cost is refunded on a miss/dodge. The remaining 20% will be regen'd by the time the GCD is up so there's little real loss. It's there, but small.
Second, a lot of our damage comes from DoT's. Top 3 damage sources should be Rake, Rip and Shred. Once rake or rip is on a boss, ticks are guaranteed hits. They can't miss, so hit/exp have no value while they're ticking.
Third reason I'd mention is perhaps smaller in comparison, but basically we don't have any real mechanic where we'd have a spell with a CD we'd need to keep rolling to increase further damage. I don't play a lot of classes, but the example that comes to mind is an Elem Shaman whose Lava Burst will always crit if the target is affected by Flame Shock and can have its CD reset each tick. If the shock misses, you lose that bonus til you can reapply it.
Edit: All that being said, the worth of our secondaries kinda suck compared to other classes and hit/exp are not that far behind. If it makes you more comfortable with your rotation, it's fine to cap them. You'll get lower average DPS, but a lower standard deviation too.