Hornet ring + Velka's Rapier = 1054 HP ( Backstabs)
Dark bead + Tin's catalyst + 1344 HP ( if you're close)
Logan's catalyst is there if you want more castings, since tin's catalyst halves the number of times you can use a spell. ( Great if you are host or a white phanton )
High Magic and dex to boost Velka's Rapier power and to charge the spells up a tad faster.
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