Thank you for advice, it's definetly better choice.
Very handy formula, thank you. I've replaced Wyrmbreaker's Amulet to Dorian's Lost Necklace (it's about 37,6 IEP loss) and have changed my enchant on hands and feet to haste. Now if my calculation is correct I lose about 237,3 IEP and gain 2009 haste. Hope it will improve my HPS