Buba, Benicio, Moegura, Radek, Rodney, Boohma, Jean, Pegh
Beaureagard, Buba, Benicio, Radek/Boohma, Rodney, Jean, Pegh, Mindy
Beauregard, Buba, Radek, Boohma, Rodney, Scopica, Jean, Pegh
All these decks aren't very expensive. In the first and third deck you can switch Jean to Mindy (mindy is 3k cheaper)
Eggman only has 7 powered and no power or attack manip. to help in win the round. Also the max of his heal is 12 and combined with the Jungo bonus it's not that good
I think you can better sell the cards you don't need for your deck (Psylo, Beauregard, Adler, Jalil, Nahema, Ronald) and buy cards like Jean and Benicio so you can make your deck complete. With a budget of 10k you can't afford Ongh but the first deck I said can work well for that budget
Yeah Eggman's a pretty bad card; his ability/bonus synergy being counterproductive, and having 7 unsupported power at 4*. Also, do what DUC-San said and sell the cards that you don't need for other cards that are better. Anyway, my recommendation is Jean, Mindy, Pegh, Radek, Rodney, Buba, Benicio/Moegura, and Beauregard.
Eggman isn't good at all
For Half here is what you will need/ want :
Moegura , Jean , Pegh , Mindy , Hopper Ld , Rodney , Scopica , Nieva & Nyema
Those cards, work towards the ones you don't have. Hopper Ld is a great card in half, I know this one from experience.
As far as the others? If you go for Mono : Buba , Radek , Boohma are the staples
The tech cards who CAN work but don't from my experience are : Benicio , Houtay ( He's easily replaced by Jean or Pegh ) , Gerald (That COB can help . . but might not. But a 6/5 Jungo for 3 Stars isn't bad; but competition )