Vortex Gaming

In the table below, efficiency is the final damage increase per 1 million mesos

Sorted by weekly bossing efficiency

Banpha Star has over 2% final damage and lasts for 2 hours, yet it's the #1 in efficiency with an absurd price of 80k mesos.

I think the efficiency will be even higher for weekly bossing characters since they usually don't have 95% PDR.

Seyram is really good, but it's a 15-minute doping, so think carefully before using it. I think it's cost-effective if you have to hit the boss for more than 15 minutes.

VIP buffs are priced high considering the lack of coins. I use them together when fighting bosses where I use Seyram.

Main stat potions have become expensive due to the gathering patch. I don't feel the difference, so I don't use them.

Even for my main character, Meister's Tonic got beaten by Banpha Star... It's much more expensive than Banpha Star, so even if you're stronger than me, check it out in stat window.

Red and Blue Star is good considering its duration of 2 hours. However, for sub characters, the 400k meso Sparkling Golden Star Potion is also worth considering. It increases ATT/MATT by 20, so it's about half as effective. (ATT/MATT efficiency is lower because I'm a staff class)

(Edit) The Legendary Hero Potion gives 30 ATT/MATT for 2 hours for 580k mesos, so this might be good too.

Mileage doping that gives 30 ATT/MATT is only moderately efficient even if 6 people receive it together. The MVP Superpower Buff is trash for daily bosses. I didn't even use it when Punch King was around.

Bonus

Think of One-Hit Kill as costing around 5 million mesos. It's good for main or sub characters that hit the boss for a long time, and weekly bossing characters can also use it to get some extra cores if their core enhancement isn't finished.

Think of Aleiyah's Elixir (Hedo) as conditional 100% final damage. Use it even if you think you'll have to retry only once every 20 times.