Any one tell me which hero to use to defeat this epic hero
I have also used Dyna with OB and SH10 insignia for all lvls on main acc.
I tried WA10 Dyna with SH8 on second acc ad i was not able to defeat lvl 4 just like you, but when i have changed SH to UP10 like @123457 suggested and problem was gone. Seems like enough firepower is key.
I used dyna with wa and up with droggo pet and he one shot heir everytime.