2x Dark Fungi, 1x Light Troll, this is the calamity we rain upon those champion.

Fungi is the only monster that has access to 2 dominance aura, and one of the very few monster that possess two multi-debuff aura.
To top it all off, Fungi has 4 skill that grants extra hit and the highest hit normal skill beating (hit 8 times).
Fungi also has powerful single target ultimate.

Troll also has dominance and two multi-debuff aura, and that's just sweet, Troll has broken immunity which make enemy easier to get debuff when having armor break, and Troll give them one at the start, SYNERGY.

Troll has giant bane that +5% damage, and it become +20% if enemy hp rating is 7 or higher, so they are dead either way.
Also dead blow which give +5% damage for every debuff on enemy, SYNERGY !!

And with the poison finishing move Poison Eater...
Don't feel so good anymore ya?
That's what you get by keep killing my team

This is the video to see them in action (steam version).
https://youtu.be/NiWI-cevqjY

The hardest one to 6 Star is actually...Specter.
Because Specter has resistance to both physical and debuff, it really cut off your execution score, the first Fungi literally has to get 7 poison stack by itself just to make this doable.

Now go and get all the sweet 6 Star.