Around 550-600 luck, 300-350 dex, the rest strength.
Your best bet is to go str/dex until around level 35 and then re-stat to a luck hybrid.
Get your dread 29-32 gear lapised in str/dex/luck, then get some legendary dragon gear also lapised in str/dex/luck.
Try and emphasise lapising dex/luck before str as those lapises are far cheaper.
Once you have that gear sorted out, work what you need to put into your stats in order to achieve your target.
Edit: You also need to keep your bow updated as much as possible. Extra attack is vital for critical damage so getting a decent bow is needed for maximum damage output.