Well, the current metagame is a ton of egg only arks, but i think i would replace plasmorex and stego spike. Stego spike is overpowered, and using stego is just digging yourself into a hole until the update comes out, and then you lose because you were too used to stego. Plasmorex because all of his attacks take 250 Time units, and it is one shot by any holy monster.
And, omegawyrm would be pretty goo after nilo, so you can take full advantage of vengeance. Using a omegawyrm raioh angelon don penguini combo is also very good. Some of Tiberius’s guides explain how it works, and it works very well. If you do this, you could get rid of rajin for a stronger monster.
I suggest browsing through the “having trouble with pvp” topic, it has tons of good strategies that dont involve egg only monsters. Also, some of tib’s strategies dont involve egg only monsters. I suggest this because taking out stego will dramatically reduce the wins of your team, making it not very good once stego is nerfed, so a new team might be good.