7K (8K with enough Glossies) I've had a surprising amount of success with this.
ASAP Surprise Present and Gift Exchange Eye of Truth and Jam Breeding Machine.
Eye of Truth is very important. It'll give you 1000 LP a turn once activated on Bakura's side so long as you have a spell card on hand.
Bakura will probably give you a Sword of Darkness. Keep it for Vassal at the end.
No Secret Pass. Attack a Jam in attack position instead.
Use Wattsychic and Tour Bus from the Underworld to handle Necrofear, defend the line, and be tribute fodder for Thunder Dragon.
Interesting deck really (and now I see why I saw someone else with the Eye...), but don't you need 3 Unions to pull the 10k with this set up?
If you saying this is working, then your luck is epic, lol.
The reason I selected Thunder Dragon was because it adds minimal bloat with the draw effect. That, and it's a one tribute summon. So you get 800 points for Tribute, Fusion, and Special Summoning.
As an alternative, I'd recommend any fusion monster with a 1 tribute monster involved. You'll have a slightly higher chance of a dead hand over TD, but it'll work.
Oh! Before I forget, if you switch out TD, don't use Fusion Gate. Tour Bus can't put banished monsters back in your deck. It can with Thunder Dragon because of draw effect.
Bakura has a weird tendency to alternate ending his jams in attack and defense position. Use Gift Exchange and Tour Bus to restack your Deck so you can attack on an attack Jam.