40 hits is not allot you need to think with 20 delay weps at 200% haste for 10 sec with a max of 6 hits a round that's 60 hits + 3-6 kicks and 3 whorl of first that's about 70 hits in 10 sec if everything goes perfectly witch will probably never happen but I can see hitting 35-40 with no problems.
So even with just double attack and no kicks no whorl of fist there are your 40 attacks.