The max will be 10 with improved haste I think. Also i think it's only the speed of the main hand that is displayed. ie if you had 2 Belm swords giving 5 attacks per round and improved haste you would still only see 10 (as opposed to 20) per round. my guy with +++++ in 2H swords using the +4 Harbringer sword used to get 9 attacks with improved haste.
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It's bleedin dark down here, slippery too.
Man, that's a pisser.
