You can do Type 1 with Nightmare but you wont be winning any time soon. If you are happy just being in the top third then this deck would do.
If you want to be a top 100 player and possibly a DT winner however you will need to change clans. I would go with La Junta, All Stars, Bangers, Uppers, Sentinels and Montana. Other clans are possible as well although I have to strongly recommend you do not chose the following: Jungo, Sakrohm, Nightmare, Roots and Freaks.