Ah yes - I've got an imbalance going on with some cards.
I have, for instance, a level 8 Thaddius Brood summoner for DEATH and often play my MAXED Cursed Windeku (level 8).
When it comes to General Sloan who I used here I only have a MAXED Portal Spinner (should have used), so I do need to invest in maxing a few other strategically chosen cards. This was a fairly low mana match.
For my Tarsa the FIRE summoner I have a MAXED Venari Heatsmith to battle with and for my 2 MAXED WATER summoners (Vera Salacia and Kelya Frendul) I just have a level 8 Pelacor Bandit. 🙃🙂