Uchiha Madara
Master Sergeant
For that to work , the set has to give over 1200 appearance to have somewhat chances to beat a soldier.For aiming/dodging/vigor/shooting/appearance sets we have many options like
Pearl, jaguar, papa legba, Josephine, perry owens are all decent .
They are like upgraded vaquero/cowgirl
While nearly all resistance sets have tactics and there is no actual pure resistance set only range specific resistance most of the time.
We need a resistance set like harvester or McLaughlin for attacking
Id say , if you don't want to nerf soldiers tactics , then the best solution is to add a similar bonus but for appearance to ALL characters except soldier or if you want to leave it only for duelers thats ok too.. but I guess it's pointless talking about these since InnoGames doesn't have the power to actually make decent character bonus changes.