I'm currently experiencing a severe lack of words to explain exactly how grateful I'm that you've taken the time to go through all that trouble on my behalf, so you'll have to forgive me for going with a simple thank you!
Now, I went through those printouts and although I'm most certainly missing some fundamental facts, I have to say that my total damage output even against single target, never mind SW and Cyclones, turns out to be much higher than I expected.
So far I was going with the rough assumption that I should take my paper DPS, add 10% to account for the 110% by FoT alone, slap in another 20% for gear bonuses to skill, throw on top of it another 15% for Blazing Wrath and 24% for Overawe, multiply the whole mess by 1.23 for the sake of my WKL, stay clear of the 5% bonus to my MH black weapon and arrive, slightly disoriented, at a DPS figure in the 170K range... Well - boy, was I wrong and glad because of it! (% It really makes me appreciate you efforts at a double rate (although, considering my aforementioned display of math skillz, you'll be well within your rights to have some doubts about my concept of 'double').
If you want to do the exercise of swapping out my Skull Grasp and Ice Climbers for Nat's combo, I'll be more than happy to see what numbers come out it. The ring I found came with 88 Dex/ 8% IAS/ 4% CC. Don't have readily available boots from the set, but for argument's sake let's assume I'll be looking for a pair with identical Dex bonus to the one I'm currently sporting on the Ice Climbers (180). The rest of the stats on both items should not impact the DPS outcome, so basically all that will be added after the change is the 7% CC for Nat's 2 piece bonus.
However I'm getting the gut feeling that the result won't come out as a substantial enough DPS gain, to warrant the loss of 10% bonus to FoT + 50-ish Dex, even if we leave the substantial EHP drop completely out of the picture. I stand ready to be proven wrong once again. (%
Also, thank you for the suggestion for switching over to FitL. I've tried it out before, and although the numbers may point otherwise - it doesn't taste like my cup of tea. The way I look at it - FitL provides a a strong damage bonus, but for 3 sec only, then you have to deal with another 12 sec of cooldown before the next shot, while for all purpose and intention BW is a permanent flat 15% boost all around. Probably works well if going for a speed clear and 3 sec is about enough to kill everything in sight, but I'm mostly doing MP 7 these days and some of the stuff there takes its time to die.
There's also the SW snapshot technique to consider, which would greatly benefit from being cast immediately after FitL, I imagine, but I don't like snapshotting, in general, and am too lazy to keep SW constantly up, to avoid the hassle of re-casting it. Yeah, I suck at this game.
Oh - and before I forget, if you want to run any tests in the future on the subject of whether skill bonuses are additive or multiplicative, I have my old rare Spirit Stone (10% to FoT) and another Skull Grasp (another 7%) lying around my stash - you can have them, if you like.