When it comes to competitive play, こいずみ gravitates toward ranked random map team. Representing Taiwan, こいずみ wins 55.6% when playing the flank position. With 279 matches and a 51.1% RM Team record, こいずみ prefers Franks (37.3%).

こいずみ carries a 884 RM Team rating. Their top civ is Persians at 59.4% and best map is Black Forest at 60.0%.