I know triangle you need LP big man and a big who can pass will be helpfull. You also need PER for you SG,SF because of the spacing you will get.
Flex- speed,passing, and perimeter. They say low post is not valued that high in this offense, but still can be used.
motion- passing,and ball handling. Higher IQ seems to be more efficient and consistent in this offense. (thats just my opinion.
Fastbreak-ath, spd is a givin.also stamina.