Since I'm obsessed with INT builds, I'm planning on having one at a variety of SL ranges up to SL120. This is the SL55 one.
Can lower END if you don't want to use the given armour set. It's just what I always use. If you lower END, raise VIT up to SL55.
Can swap Bellowing out for DWGR, Wolf, or Red Tearstone (or even hornets)
Can swap out Power Within for Dark Bead. I just like PW to one shot those SL200 guys you sometimes invade.
Can swap out Homing Crystal Soulmass and 1 slot of Soul Spear for Pursuers. However you only get one cast with the Tin Crystallization Catalyst.
My favourite place to invade with this is the Painted World. The straight line sorcery is hard to avoid on the narrow bridge and you get very frequent invasions at SL55.