There are many good combinations of decks out there.
With 200k you should be able to make a good dual-clan deck.
you could make a good pirana half deck with that.
Now you have to decision of what clan would complement Piranas.
I personally like pirana-Junkz, but you could easily go to presets and set it to survivor elo and pick Piranas as 1 clan and any as another then browse around.
I have a deck for 7k clintz
play in ELO mode as it is easier to win there