Using stamina potions on weekends (double items from sweeping) instead of mondays (double exp -> 1500exp/sweep more) will benefit you in a long run. Right now its 93lvl here and im always short of most purple/yellow/red awakening mats. There's no point holding back leveling in first 2 months of your server, because sage battlefiels is limited to only your server. Holding back is a strategy for people 70+ (at 70 you unlock last treasure for now) once cross server activities are up, this way you still can get seal scroll and 5-15adv refines each sage.