Board Thread:Questions and Answers/@comment-50.31.252.86-20150503112035/@comment-26215551-20150717230140

Level 60 is more than enough for your Tantous. I started bringing mine onto the map at lv35, and when I cleared 6-1 boss they were at lv40. Try bringing troops with high HP (e.g. Heavy Infantry, Catapults) so they don't lose troops too often. Also the Yaris on the map always move first and deal a fixed amount of damage, so you'll have to get used to your swords being in moderate damage.