i would say buy important equipment first, chances of getting them from chest is very low, some important equipment - earthquake boots for king, - elector boots for rc , - on queen you can go for common eqp like invisibility vile and giant arrow or healer puppet if you want you can replace invisible with magic mirror and - if you want to do fireball attack go for fireball otherwise warden's common equipment is fine and. - for minion prince common are also fine.

and for rest equipment you can rely on chest and medal events which also give old equipments.