Sources of Curse Effectivness?

Hey whats up forum!

Ok so i wanna push my Curses to THE MAX!

in the legacy of phrecia event im going to play Harbinger witch (free temp chains + 100% curse aoe)
temp chains + blasphemy + enfeeble + vulnerabilty + punishment and assassins mark self cast.

on the skilltree i can grab: 40% inc. curse effect and 2+ curse lvl
but using blasphemy has a 25% LESS modifier which weakens my curses a bit.
heretic veil gives another 2+ lvls and cospris body armor makes curse immune enemys cursable.



so i have 5 curses, +4 lvls and around x1.05 curse effectivness.
is there anything else i can do to make my curses stronger?

mhm nobody here who can help? :/

anyway i found another unique item that might be usefull

Dying Breath 2 hand staff
Nearby Enemies have 18% increased Effect of Curses on them