Ok, I need some explanations. I am going to restate here the information I read, my build, and the possible conclusions I could come to. Please help me out, and give me the correct answers.
Quoting the compendium:
Two Weapon Fighting attacks (weapons or unarmed) have been optimized for performance and balance. Off hand attacks now have a chance to proc (trigger) off of any main hand attacks based on the number of two weapon fighting feats (and related enhancements) you possess. (Instead of being predetermined on certain attacks in the attack chain.)
-A character with no two weapon fighting feats has a base 20% chance to proc off-hand attacks.
he Two Weapon Fighting, Improved Two Weapon Fighting, and Greater Two Weapon Fighting feats now grant a +20% bonus to proc off-hand attacks.
-Ranger Tempest I and II now grant a +10%/+20% bonus to the chance to proc off-hand attacks when dual wielding instead of a bonus to attack speed.
-Monk Air Stance and Ranger Tempest I and II now stack with each other for these purposes.
-A new mechanic has been introduced called "double strike." A character with a double strike chance has a chance to make an additional attack roll with their main hand weapon any time they make a main hand attack, on the target of the first attack. Many speed bonuses have been changed to double strike effects.
-The Fighter Alacrity capstone and the Paladin spell Zeal have been changed to a +10% bonus to double strike.
-Monk Air stances now grant a +2.5%/+5%/+7.5%/+10% insight bonus to double strike chance instead of an insight bonus to attack speed. (The enhancement bonus to attack speed remains.)
-Ranger Tempest III now grants a +5% double strike chance while wielding two weapons. (The Shield Bonus and to-hit penalty reductions that Tempest grants when wielding two weapons, or the enhancement bonuses to speed from Wind Stance remain unchanged.)
So to my understanding:
--Off Hand Proc.--
Your base chance is 20%.
TWF gives you +20%, ITWF gives you another +20%, and GTWF gives you another +20%.
Tempest 1 gives you +10%, tempest 2 gives you +20%.
Option 1: Therefore, if you have GTWF and Tempest 2, as a level 12 ranger, you will have 100% chance of offhand strike.
Option 2: The entire TWF line only gives you 20%, so you get a total of 60%.
Still beyond me: Why they said 'For these purposes air stance and tempest now stack'. Air stance is not stated as giving off hand proc.
Zeal/Fighter capstone give you 10% bonus.
Air stance give you 2.5% per level.
Tempest 3 gives you 5%.
Option 1: All double strike chances stack.
Option 2: You only gain the highest double strike.
Still not clear: Is there a base double strike chance that these numbers improved? Can you only double strike with 2 weapons? If so why is it all based on the main hand weapon?
Therefore, this character combination:
Monk 1/Ranger 18, with the tempest line would look something like this:
Double Strike 7.5% (+ Base chance?)
Off Hand Proc 60-100% (depending on the TWF line explanation)
Speed Enhancement 7.5% (From air stance)
Can someone clarify if the stance enhancement stacks with haste?
Anyhow, please see if what I am doing is correct, wrong etc. Also perhaps someone has already figured out the max attacks in a minute based on this. I have tried searching for this explained in threads, but have been unsuccessful in finding an adequate answer.
Thanks in advance, J