I took some screenshots

http://imgur.com/a/5n1lx

The skill of sentinel is flame (physical dmg, and do around 200 to 400) and for the warrior air strike (real dmg aroun 400 to 600), i believe that is a low dmg for a 4* character and the information in the skills dont say what stats is the primary to get more damage, btw all the talismans are lvl 20 and thank you for the reply