use
4-3-3
or
4-3n-1-2
or
4-1-2-1-2 (wide diamond)
use some blue arrows too
and if your team is stronger, use the same formation
tips: 5-3-2 is a defensive formation (obviously duh), thus set your strategy accordingly
p.s. I'm the master of 5-3-2 haha, lv 31 here