Iirc, just put your attack speed/attacks per second from the detailed chart (like the 1.82) into the formula above.

When you say your attack per second is 1.6, which number does that refer to? The 1.82 is the one in the details sheet kan

Mostly it's 2H Xbows or Bows, cuz when you use 1H Xbows, ur atk alternates between the 2 weapons so if there's a huge disparity in the damage, ur dps will drop.
At entry lvl 1h xbows it isnt worth it cause you will need good stats and socket on the xbow to break even, which will often cost u an arm and a leg, whereas a good quiver off the AH which gives 15% atkspd bonus (same as DW bonus) costs u just a fraction of that.
It's more common for builds highly based on crit and using stuff like HA with the final rune which relies on critting alot for aoe dmg.
That and the extra discipline u can get off 1H xbows that arent available on 2h Xbows and Bows.

if rich enough to get 2 somehwat equal dps 1 handed crossbows, both with their separate sockets for emeralds, will the crit damage stack or calculated individually?

dual wield xbows are awesome, if u're rich. sadly, i'm not and i use a 700+dps bow only. saving up for a 1k dps one.

Grenade isnt recommended for glass cannon non dual wield set up, its practically a melee range attack.
Min req of grenade is dual wield for the permastun or you need stun from rain of vengeance to help out.

Even then, its not really for the dmg, just for quick stagger to fill up hatred/health with loh/lifesteal.On inferno, the stun is 0.1x2 sec =0.2 sec 
I dont think any dh could do inferno without NT.

nether tentacles

NT = No Testicle 

They dont stack , but they proc seperately.

HP is 56k. My MF currently at 0%. Before this I was farming Act I and II @ 70% MF without NV. That's how I get most of my gold to buy my gear.
Around 20million gold.

Not very sure how this 10 times single target work.

Maybe is like this: a DH hunter stand at the same spot and spam 10 caltrops at the same spot, so is like when a monster (elite or boss preferably  ) once kena the traps, the monster is consider kena 10 caltrops (max) at the once.

55% damage x 10 caltrops, plus 60% slow, assume a monster stucked for 2 sec to get out from the caltrops, means 550% x 2 sec = 1100%.

but spamming 10 caltrops need 60 disc, normal DH only have 35 disc, unless using "perfectionist" plus preparation.

correct me if i am wrong.

no la...the caltrops one is 1 trap only hit 10 times.Before this infinity until can proc stun/freeze/blind/fear
After that the mob wont take dmg.