Sorry for this late reply.
@jameba thanks for recognizing me I guess... I seriously did never expect that'd someone tag me like that.
Long story short, I was an maining Ultimate Majin on the TW server 2. Won twice 2nd party budokai and went on a lot of PvE with the following build
Also & almost won 3rd place solo but I was out of luck with Divine as my opponent.
You can farm easily with kid buu, your buffs should last around 25+ minutes, you have all of the important buffs maxed. Also kid buu is pretty useful for qualifying into the budokai (that was literally the only way to qualify as an Ultimate Majin), in PvE you would transform & help then go back to normal, re-buff & transform again...
You can eat debuffs, poison (there are bosses with insane poison dots), abdominal damage... Even remove stuns/paralyze from yourself.
In 5v5 party budokai your job will be to buff everyone asap & spam KD the Plasma Majin or enemy healer.
"Hyper Bomb" is great for AoE KD + 40% phy. dmg debuff.
"Dyanmite Horn" for single target KD.
Eat debuffs & support your healer non stop by healing him, or the focused target.
In solo budokai your job will be to survive & win by draw.
Note: This build is old meta, feel free to experiment.
I do miss the oldest meta where you could farm & kill easily with "Spin" & "Fire Spin" skills