Personally I really like Junkz, they have some of the most solid walls ever. One problem however is that they're lacking in damage so unless you're going to pay a lot of clintz to make a Freaks-Junkz hybrid you're better off going Sentinels as obviously advertised above.
I do have a few deck lists if you're still interested in Junkz as I've tried many deck hybrids(to mixed results).
Be warned though, bad splits can kill a Piranas-Junkz hybrid. Junkz are also very vulnerable to SoA clans and dmg reduction will weaken a deck that already suffers from low dmg. So be careful in what cards you pick.