The mana/stamina leech works great for a wammy reguardless of the base damage. The life leech is a non factor for a wammy because they spam the curse weapon spell.
It's alright because it has high intensity on the leeches and of course is a 2s weapon. Id say 250-300k cause ppl are picky. I use a 200k kryss as my main weapon to tank/kill harrowers lol...