In extended I like them better in half decks (Randy + Robb Cr + Saki + Striker = Amazing) with something like Junkz (Rowdy + Tremorh + Fuzz + Sasl Lovelace) or Uppers (Magnar + Lady + Kazayan + Oxen)
In standard I like them both mono (with Mechakolos splash) and half (Saki + Crazy Carlo + Quinn + Lance) also with Uppers (Lady, Magnar, Kazayan, Jose Star) or Huracan (Noctezuma, El Divino, El Gascaro, Derby Queen)
Suprisingly great. Few things I would change is Augstino. Change him to Caesar, Ashley, Jessie, Loretta, or Stacey. Miss Jessie could work too, if no splashes.
Dallas. Change him to a 2* so you don't end up facing 40* decks. ^ See previous options. Other than that, the deck works.