Speed

In battle speed is a big factor and can decide of the end of the battle.

The player with the highest speed will start the battle. Starting first or second is in general good if you have fury control and when you're second you can generate fury faster.

There is some way to up your speed. The first way is to achieve some achievements (this feature is unlocked at lvl52) which will have some challenges for you to complete. For example, one challenge is "Spend Diamond to reset one store 12 times" you'll get 30 speed when you do it. The second way is the Digimon Spirit (Digimon spirit will be detailed later aswell as Achievements). When you advance your digimon or strengthen your digimon they gain speed as well.

Thrones Lee - S2:

For now what you can do is leave your sub digi at green tier while focusing your main to purple/orange. Don't confuse this with Advancing of Digimon, what I am referring to is the different tier found in Digimon Spirit. Also, achievements unlocked at lv 52. is where a huge boost of speed comes in for everyone, even for lower BP players. Advancing the quality of Digimon also grants you higher overall team speed. Unlocking more digimon and a completion of digimon that belongs to the same Crest also boosts speed. Lastly, "Speed" is to determine the priority of who gets to start the battle first.