Having difficulties in boss battles? Can’t beat the Omegawyrm? Try this!
(1) Put 3 Arks with stun skin at the front. The boss will get stunned after killing them. I use Rajho.
(2) Put loads of Arks with flash bomb. I use Storm fox because they are easy to farm. I have >10 in my team. This can stun the boss to >1000 TU.
(3) Time strike. With >1000 TU, you get a >2000% damage bonus. I killed all the First Ones in one shot. I use Vetiger.
Hope this helps!