• Yes, battle, but don't make it your priority. Battles and Actions combined are the only way you can reach Overlord level.
• Save your money. A Pallet of Dr. Pepper is hard to get, but is worth the wait. If you're desperate, fine. Spend $180 on a can of Red Bull. I don't care.
• Try to use HullBreach, Savant and Skunkman all at once, because if you get them all to Overlord, you unlock a special 4th character.
• Different characters are good at different things. Savant has a high battery amount, Hullbreach can buy stat upgrades (I think?), and Skunkman has a lot of starter allowance. The 4th character's specialty is secret.
• It takes time to beat OverlorDS and get on the leaderboard. Don't rage if you're not there in a week.
• Don't get your Site Rep. to 0%, because if you do, you get banned until it increases.