Throwing in my 5 cents....
Piranas currently rule ELO. Id say they are in the top 3 clans in that mode...possibly number 1...possibly.
Jungo are still good, very good but id say without Askai they aren't as good as they could be. but Jungo/Frekas, jungo/ Pussycats or Jungo/Roots devestates ELO!!!!
Jungo is personally my favorite clan cause most of their characters have a 7+ damage and their abillitys really make them own the opponent and not only 5 stars like Sylth and askai and Ongh and Nahema but also some 4 and 3 stars like radek his base attack is 7 and his ability is -2 opp. atk so basicly his attack is nine and there is buba his base attack is 6 but his abillity is support: +1 power which, if u have a all jungo deck, can give you 10 power with 5 damage its not much but with 10 power thats alot and with almost any other 5 star like askai and nahema thas a K.O. yea so their a bit s**ewd when fight against gheist but there is also stop: abillitys and ashiko with a base power of 8 has that ability, and he is the cheapest jungo on the market, if he wins against gheist its plus 5 life(including the bonus) and there is scotty who's abillity is stop: +3!!! damage with a base damage of 5 so and base power of 7 which is all right.
I dont know about Piranas but i think Jungo really kills =)