1) u were right

now it is 200% in calculations
2) no them r not specials, just regular swings so they use ur hit%
3) if shaman got same amount AP = DPS it is same to rockbiter and WF it dosent mater... but i make examples to u.
WF shaman got 1700AP + that weapon
1700/14+100,2=221,6 *2,8= 620,48 <--- basic weapon damage
1700/14+100,2+33,9=255,5 *2,8= 715,4 <--- basic WF extra strike
norm, norm & norm | 620,48 | 715,4 | 715,4 | 2051,28 | /2,8= 732,6
3*normal + 4 normal hits = avarage <--- makes that 20% proc and after it takes that 13.4% miss rate off from procs
(732,6+221,6*4)/5=323,8 (miss 732,6*0,134=98,2) 323,8-98,2=225,6
rockbiter normal
1700/14+100,2+74=295,6
see... both of them get same buff from same AP
and one thing if there is 3sec cd in WF u should look after resonance multipiers like 6,3,1.5 or 1.... to get it strike right after another proc.
whit ur 2.6speed weapon + flurry 30% = 1,82speed <-- second strike will be 3,64 so it is late 0,64
2,8speed + flurry 30% = 1,96speed <-- second strike will be 3,92 so it is 0,92 late
2,1speed weapon is too early 1.47.... so perfect speed is about 2.2 (+flurry 30% 1,54 so second strike will be nearly ideal 3.08)
Every 15.7 Points of Haste rating you will have 1% more Attack Speed at level 70 <--- so u can tweek it to slower weapons too
i calculated some test and to get 2,6--> 1,5 whit flurry u need additional 12,5% (196,25 haste rate)
it is not impossible but needs gear alot