Lavella
Perks:
Image of Baena
Baena’s Crown

Spells:
2 Kolune’s thunder
2 Fill with zeal
2 Shield of anox
2 Favour of the war god
2 Anox’s blessing
2 Fortune
2 Light of Ahnsai
2 Judgement of Urix
2 Terrify
2 Primitive idol
Crafted cards 2 primitive idol 2 terrify

Korghan
Perks:
Song of Vaylar
Armour of the dead
Murmur of the fallen
Gauntlet of the Kedal
Honored heirloom

Spells:
2 Trusty Sword
2 Warriors onslaught
2 Balanced attack
2 Fury of ages
2 Cloud of Steel
2 Kindled spirit
2 Taunt
2 Reprisal
2 Thirsting Axe
2 Soldier’s flail
Crafted cards 1 armour of the dead 2 cloud of steel

Renna
Perks:
Piercing heat
Molten Veins
Flamecrystal choker
Circlet of insight

Spells:
2 Firebolt
2 Fireball
2 Engulf
2 Glacial Shield
2 Breath of insight
2 Petrifusion
2 Spellshapers Curio
2 Stone Dart
2 Fiery incantation
1 Brimstone tome
1 Untamed flames
Crafted cards 1 circlet of insight 2 stone dart

Game plan:

This set of hero decks is designed to control the board while trying to assemble the combo of fiery incantation/blessing of Anox/petrifusion with as many copies of stone dart and wargods favour as you can then blowing up the boss. Blessing petrifusion fiery is 24 piercing damage at 7 range, if you add one wargods and one stone dart its 33, if you add two its 44, the point is with this combo and a little bit of help from the warrior you can 100 to 0 the boss over your 4 turn channel.

Tips and tricks

If you don’t see any good plays hit the guard button, seriously the guard button is amazing and each character should be hitting it multiple times every game, it draws you a card and lets your heroes move very fast, the difference between having a good answer or not is huge, like having to individually kill every Radagar minion vs having engulf or cloud of steel.

Your priest should be before your mage in the turn order so you can cast your buffs and use them in a single tick, if you are unsure just make your priest act at the start of each turn.

Try to combo fireball with molten veins or brimstone tome, having 0 or 1 turn fireballs makes a huge difference

When you can save breath of insight for the turn you are going off, your max handsize in this game is 7, using breath of insight you can get to 9 cards in hand making it easier to set up all your stone darts and a petrifusion.

You can use brimstone tome to get an extra free spell with blessing of Anox when you go off with either fireball or your weapon attack.

Let Korgan do your tanking, try to keep your other characters out of range of minions that you can’t immediately kill, the difference between having 3 armour and having none is huge, between your armour and lavella’s healing per turn you can ignore anything with less than 6 attack.

If you need more fury to turn on armour of the dead don’t be afraid to override your current weapon to gain fury with murmur of the fallen, if you weren't going to use the weapon anyway you lose nothing by doing this.

Fill with zeal should normally target Renna a few turns before she is ready to go off as an additional copy of favour of the war gods.

Don’t get too focused on the combo, you can use buffs early if you need them to efficiently clear out the bosses lair, buffs are extra effective on multi target or channeled attacks, for example buffs combined with engulf can brutalize the bosses board.

Manessa
If you see essence shock manessa ignore every minion that isn’t going to kill you and rush the boss, she is the squishiest boss in the game and most minion summoners are very inefficient, pretty much only kill militant monks otherwise just get incantation and barbeque the boss.

Radagar
Against swarm Radagar move your warrior forwards to pull all of the lair minions and spawns towards him, if Korgan is the only target in range minions will cluster around him letting you set up easy aoes, don’t be afraid to center fireball directly on top of Korgan especially if he has 10 fury. If Radagar is playing with suspend minions use guard to position your characters to act as soon as the minions spawn and blow them up before they can attack, or just terrify them, either works.

Mech Scorpion
Move backwards at the start to get out of range of his lair minions and separate your team so that pounce won’t hit multiple people, armour is the name of the game here, he will always target whoever is front so any armour you can give your warrior will apply every turn, if you are still having trouble with him lavella can add chant of protection to her deck.
This matchup is a race, ignore his lair and hit the boss whenever his armour is down. If you have petrifusion and fiery incantion use them quite early, howl from within has a decent chance of hitting renna and extending the duration of incantation.

Giant Queen
Korgan has enough armour to walk directly forwards and block giant queens movement constantly, if your attacks woudl be ineffective just body block her rather than wasting multiple ticks plinking off her armour. Your other heroes should move directly backwards so that you won’t be hit even if giant queen casts draw in. The goal is to use incetal damage to get giant queen to just above half hp (28) then combo off and finish her.
Be careful if giant queen casts mustering might, have only the warrior in range when her next turn comes and don’t cast any long attacks, you need to be able to leave if thundering wrath goes off.
If you are having trouble in this match up add intervention to your deck (common faith card), giving armour to your entire board is great vs her chip damage.

Cards to add when you have a larger collection:
This is not an exhaustive list, but here are some cards you might want to put in your deck either because they help reinforce your primary strategy or because of their individual high power level.
Harsh light: one of the best minion clear spells in the game, if you have multiple harshlights it might be worth having your warrior act before your priest so he can position himself for optimal aoe’s

Ancient blade: probably the most efficient weapon on the game, good if you are having trouble killing larger minions

Rune of Petrifusion: makes petrifusion act as an additional wargods blessing to make the combo even more brutal

Quicksilver bauble: One of the best cards in the game, makes it easier to align your characters on the right turns and get out of dangerous boss attacks (such as thundering wrath), it is also great to make your windups hit before the opponents can react, giving you good clouds of steel.

Cards to take out when you have a larger collection:
Warriors onslaught and untamed flames are the first cards you should remove from warfare and wizardry. If you are unsure what to cut then cut something that costs a lot of ticks. Short tick cards leave you less vulnerable to changes in the battlefield and cycle your deck faster to find your best cards.