Here's my way to farm Bakura. Should help you all. The trick is to not cause damage by using econ and getting lv6 out asap. Keep sending set cards back to hand. Use gaia field spell for over 10k. Then after both unions use twister for 500 lp to destroy it for comeback victory (if needed) you can replace typhoon with another level up if you want but this worked best for me.
https://ibb.co/ekjWhG
Forgot to mention score ranges from 6k to 8k+. Depends if your LP is below 500 and you get the Effect dmg only score boost. Consistent if you make good decisions. I'm done farming Bakura already.
Changed my ratio a little bit to include more position-changing cards and monsters, less Level Up and spell destruction.
Is slightly more consistent. Still lost more than I won, but that could be attributed to inexperience with using a weird deck. I got my last Dark Necrofear for my constant losing so I retired without trying that many times.