Early Rounds: Activate Goblin (3) Synergy effect on board with 3 Goblin pieces (Heaven Bomber, Sky Breaker, and Soul Breaker), which only costs 1 Gold for each and purchase some Assassin pieces. During this period, try to earn a winning streak for more Gold. If you can't, try to reduce your on board pieces by 1 or 2 or even fewer to steal a lose streak that reduces your HP loss (not for novices). The main purpose for early rounds ¡s to reach Lv.6 as quickly as you can and save more than 50 Gold for more interest.
Mid-rounds: With 50 Gold, you can Buy Exp with the exceeding part to reach Lv.8. During this period, ¡t is recommended to rank up your Assassins and Druid first. lf you have more than 5 Assassins ranked up to 2-star, ¡tÌl be a nice choice to deploy them on board to activate Assassin (6) Synergy effect.
Later Rounds: Upon reaching Lv.8, you can try to have all your main pieces on board, and keep ranking up their stars or Buy Exp for more Chessboard slots with your winning streak rewards and Interest.