If you're worried about barrier, you can try to bring him to a as low initiative as possible + switch him to play position 4 (i.e last ninja to move in your lineup, which in your current one is kakashi) C*so consider playing your lightning main position 1 or 2, so that your mystery could have a higher chance of triggering first. Running root of warrior as a passive is fine, but could try to maximize it by adding other sword-ninjas to your team. Maybe the different ninjas that you have would be nice.

Hashirama is usually paired with sage naruto, so you c*so consider to get him when you can.