Didn't think this was worth submitting a 'guide' for so I'm just jotting down some stuff here.

-When killing, try to be as close to the ground as possible and knock them downwards, killing horizontally wastes a few seconds of them flying away and killing upwards is even slower

-Combo counter is important! Your dragon rushes and vanishing hits will do LESS damage if your combo is high, doing smaller number combos with meatier individual hits will take you far. However, on the other hand, you charge the smash attacks faster if your combo is higher, the most useful instance for this in my opinion being if your meter is a bit short of what you need for a super, you can hit then with a stun smash attack and take a moment to charge 1/3 to 1/2 of a bar and then still hit them with an instantly charged knockback for dragon rush followup.

-I feel that signature moves are currently not being utilized as heavily as they can be by the few of us that do run this game, especially the Afterimage line. Still feeling things out on ones like Pump Up and how cost efficient it may be to sacrifice ki charge for pure damage in the case of fights like Vegeta vs Frieza but there's definitely room there. Obvious ones like Now I'm Angry! or Unforgivable! are incredibly useful for hitting HP triggers against Frieza and Cell.

-In fights with time-based events like EVERYTHING for Kid Buu's final fight, anything that freezes the match timer such as Mystic Combination will slow down that trigger, so avoid those as much as possible. This blankets the whole run in regards to using things like rush supers that really aren't time efficient, whether it's for a story trigger or just dealing damage quickly.

-Mastering Z-countering is stupidly good and would remove the majority of the threats in this game if one of the most illustrious BT3 players ever graced us with their presence. Too bad I suck at it.