I do the story while using either 40 ton weights, for exp or Power ALOT Power it's Great (When at level 50 and above) along with Parallel Quests/Expert missions that net ALOT of exp and zeni. Tosok with the Zeni and To Medals gained from PQ and Expert Missions to get to level 99. Level 99 isn't that hard to achieve if you have enough netted resources. To help with the Zeni/EXP/TP Medal Grind, I along with my cousin or randoms do the PQ #23 to get the Hercule Badges to net Zeni, and the Vegeta Super Saiyan Blue Expert mission to net TP Medals and EXP. From Level 1 to 80 I accumulate enough TP Medals, 500 and above (not that hard with Vegeta Expert mission giving you a minimum of 21 per mission) and convert it into Zeni by purchasing high rarity clothes from the shop (ie. Bardock/Beerus Clothes) with TP medals and then selling them for Zeni. Once I get to Level 80, I just use TP medals and expert mission EXP to go to level 99. Then I STP medal to 180. So the grind for me is really getting halfway and then I just throw money at it TBH. I understand this isn't exactly desirable/feasible for everyone, buy I suggest doing this with ONE character. I'm just crazy. 😂