Any Idea how to get S Assessment in Sky trail

[jamesbacmon]

Don't know how this S assessment work.

i have 9 Assessments from which 4 of them are in which i have cleared fast and done more damage while other are ???? Dono why i got them ,
just wanna know how to get or what criteria required for S .

[ancev]

Basic strategy: use opposing element of the boss for attacks (ex: for Fire Boss-water) to maximize damage. Use sylph delphic or most powerful attack with brutality rune when boss has 1HP bar or less.

[Czarcasm]

http://forum.r2games.com/showthread....-for-sky-raill

[Tourist_Teh]

if you are dealt less than 50k dmg in total, Remove your troops, as their dmg isn't included
so you will be able to "easily" finish the last boss with overkill