doon cuebiyari build

hello friends
i make the doon cuebiyari build
for now 1.5k strength. but i hope hit the 2k
i vant to ask , vich skill good for low cast speed char ?
my asc berserker, for life leech with spell but even so lack life leech
i using combined sorching ray +cast while channeling+glacial cascade
what yours advice 3 link+doon s iron will or 5 link chest armor? for enough damage and good life leech