Well this belongs in the help forum but I'll answer it.
If you do CT your cup game I would first TIE Tuesdays league game to build up your enthusiasm, so a CT at 7 enthusiasm (maybe high 6) makes your team perform better than a CT with 5, and your enthusiasm won't take as long to return to 5. That will probably make you lose your league game but IF you win the cup game it'd be worth it. Looking at this teams last cup game they played all their backups with unknown enthusiasm(either normal and TIE though). Looking at the ratings from that game, I would run a 2-3 since their big men played very well, and had the highest ratings. You play to your strengths because regardless they will play M2M.
Good luck and I hope you win.