Focused mostly towards magic but I use a few faith spells as well. Silver knight shield for stability and crown of dusk to increase magic damage while moonlight gs increases magic defense. I use dsrk silver tracer for its poison and toxic ability since players never invest in resistance it'll end them quick it also has the highest critical modifier making it great for parties and back stabs. I end it at 50 attunement because that's when the maximum slots are received. As for my armor, black iron armor is obviously the best heavy set while havels just adds poise. You don't need more than 75 poise.
Tin crystallization halves your spells I recommend keeping a talisman ready as well maybe darkmoon.
I like using white dragon breath because of the high casts and because it's great in tight corners it'll also do very high damage.