dmg for eman slayer

[telem2008]

so i bought armor and stuff and now i can survive t4 eman boss
but i do only around 375K dmg that is a problem.
i have vorpal katana and im lvl5 eman and almost 700mp
how can i improve my damage?

my skycrypt: https://sky.shiiyu.moe/stats/telem2008/Coconut#Gear

if you can help it would be great

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