Piranas aren't really about 2hkos. They're more about control and winning 3 rounds. But if you insist i would suggest Surstorming/#lizbeth cr/Miss Lizbeth and even Sliman as your heavy hitter. Ursula, Raeth, IronJaw and even Coleridge are good 4s. 3s are Ector, Taljion, Langren/Ulrich, #d4eth ld and maybe Morgane for her 5 damage. 2s are negligible. Puff an Molusko are good for walling. Does that help?
T2 is kinda easy. Just pick:
Surstorming - Lizbeth CR - Sliman - Selma - Rekved - Fischer - Ahkab and another card of your choice (Miss Lizbeth, Rakhan, Ursula, it's up to your playstyle).
Put a leader like Ambre or Melody for fun too, if you want. Clean, brute force 2HKO deck (With a few weaknesses, but w/ever).
T1 is trickier. For damage dealing, you should check out Ector (For DR protection), Miss Lizbeth (The heavy hitter that will allow you to KO with 3/4 damage cards), Ironjaw (Solid, possible 7 damage) and Kristin (Extra DR protection with aggressive potential). Throw in a few round winners too, like Tyd, Ursula, Taljion or D34th LD (And despite not being round winners, Langren and Morgane are good too) and to fill in the 2* spots go for Parmabarb and Kalder (Just to keep the damage flowing). Tula used to be a must-have, but nowadays it's way too risky to use her, so I'd avoid using her.
Then, again, as HipHoppa said, Piranas are not a 2HKO clan. For them, 2HKO is more of a side strat then something you'd build a deck for. It's possible, though, kinda.
Thanks a lot for your suggestions, they really helped me a lot!
I think im going t2, it looks too hard to do an t1 2hko piranas deck.
So, how about this:
Fischer/Miss Lizbeth (still dont know)
Raeth/Coleridge (still dont know) and I may try use a leader here instead, still dont know...
Hawkins/Kalder (idk if Hawkins is a good option, once its a 2hko deck)
Is that good?
I'm T2 tourney Piranas player and it's definitely not about 2hko's unless your building with mostly pillz manipulator cards in your deck which I never do on T2. I prefer gaining more advantage in power with only Eyrik and Surstorming the only 5 stars in deck and the rest can be 3 & 2 stars up to 26-27 star deck and you should be able to hit 400+ points with not much pressure even when you lose as long as you hit 4 rnds yu can still get a descent amount of points around 12-14 on most losing battles