Arena

What do you do when you lack the points to do regular missions? Kill time in the Arena, of course! There's two modes to do so, the Colosseum (3v3 vs other users' teams) and the Battle Royale, which is a bit more complicated to explain.

It's advised to have at least some fully trained 3-Star units before trying out these modes to reduce the chances of getting your ass kicked.

Colosseum


This one's easy. Pick three of your units, duke it out with other teams, earn points and score as much as you can to get items.

The users are ranked in two leagues, Regular and Ultimate. Depending on how well you do by the end of the ranking, you might be promoted or demoted. Nothing much changes except the difficulty and the items you get. Speaking of items, every day you get items for free in the first 10 matches, regardless of the result in the following order:
 * Training Points
 * 4-Star Short Crystal (1)
 * 4-Star Middle Crystal (1)
 * 4-Star Long Crystal (1)
 * Rider Colosseum Gacha Ticket (1) + 500 Guild Points (GP)
 * 4-Star Support Crystal (1)
 * Continue Item (Training Points in Ultimate League)
 * 4-Star Guard Crystal (1)
 * CP Recovery Kit (Training Points in Ultimate League)

Once you've got more/better units and have maxed them out, check out your Start and/or Special Combos and team formation if you want to move up on the ranks. Have fun!
 * Rider Colosseum Gacha Ticket (1) + 1000 Guild Points (GP)

Battle Royale
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This mode's a bit more unique. From your roster, you have to pick 15 units or less and do a survival round of several teams of 3 units that eventually get beefier until you get the item at the end (you can switch units between rounds, so you don't have to worry too much about it). In this mode there's no Start Combos, but you get bonuses depending on which units you have of your full team. You better pack a good healer, because the latter rounds will be much tougher with worn-out units. For each round that passes you get either crystals, Training Points, Silver Gacha Tickets or equippable items. There's three difficulties to choose from and you can only do one Battle Royale for free each day, but it takes more time to complete so you can recharge your batteries.