What are the best ways to grind units quickly?

Aprobli

I didn't get too far in the banquet event. What are some methods to getting a lot of units quickly?

Nemesis_17

Arena is responsible for like 80% of the unit gain a ftp player can get

captain_rogers

Guys don't give him ideas otherwise he may grind hard and waste his units in banqsh*t event.

Maroonmonsoon

Open your wallet pull out your credit card, grind away