Couple of questions

1. What's the quickest way to level up?
2. I'm having trouble winning in the command boards. It can't be this hard... What's a good strategy?

1. Quickest way to level up is have abilities like EXP Walker, EXP Chance, be less than 25% of health and then spam Mega Flare in the Reactor area in Radiant Garden, or anywhere else you think gets reasonable exp. Repeat.

2. Mostly to use the Two/Three Dice move, two mostly. Check all 4 marks you have to touch and work out the quickest route, before you start rolling. If you are going to touch a R/B/G/Y square, make sure you use a card, since you get one back when you touch those squares. Stunning other players helps too.
Also, try and land on the special square (Teleports you to the square of your choice, Captain Justice, Jolt, Captain Dark )

^ Can you have that Double EXP ability and use Mega Flare at the same time?

I had the same thought. It will be a bit slower, but with the double XP, if you're diligent, I level up once every ten minutes, and I'm level 56.

quote Ultravegeta

1. Quickest way to level up is have abilities like EXP Walker, EXP Chance, be less than 25% of health and then spam Mega Flare in the Reactor area in Radiant Garden, or anywhere else you think gets reasonable exp. Repeat.

2. Mostly to use the Two/Three Dice move, two mostly. Check all 4 marks you have to touch and work out the quickest route, before you start rolling. If you are going to touch a R/B/G/Y square, make sure you use a card, since you get one back when you touch those squares. Stunning other players helps too.
Also, try and land on the special square (Teleports you to the square of your choice, Captain Justice, Jolt, Captain Dark )

The double experience has been working well for me.

What do you mean by "Two/Three Dice moves?"