La junta have high damage because of they ability so your best bet is to try to inflict as much damage to your opponent as you can. To help you do this try using the weaker cards to do the damage whilst using cards like ray as bluffs e.f only giving them 1-3 pillz.
Whichever one you chose 2hko is the main strategy
You bluff a hell lot and with cards like Thormund 1 pill is normally enough. Its maintaining pillz and looking for obvious bluffs that this deck is the best at. If you know your opp is bluffing with a dr send a 4 or 3* in and get free damage In the 1st deck you can 2hko with Bryan Gatline Isatis Trish with another card with 5 damage. With Isatis you can ko with Nahomi Jane Ramba and furied Victoria
When going into Higher Elo Victoria Nahomi are good for Ghiest so is Bryan Gatline and Jane Ramba. Thormund doesn't rely on his ability as he has sturdy 7power but Isatis and Trish are weakened against Ghiest. Still 7 8 dmg is a good bluff.