Looking for a few nice wins on the low-mana battles? Try Cerberus, the beast low-cost tank.
The Heal is the key, before he hits, he boosts 2 hp lost. So, often in low cost battle in the round 3 with your Cerberus, he becomes invencible because your opponent don't have more the 3 atk points.
It's to have back liners killers, such as Fire Elemental and Kobold Miner, so they can limitate fast as possible the Atk Point direct to Cerberus.
Analyze that battle, it's easy to see that the opponent can pass up the tank not even in 3000 rounds, after the blast ability killing the Serpentine Spy.
That's my go to strategy on Silver and Bronze leagues with 16 mana cap or less, making me love that card so much.
Wanna see the outcome of that battle? Go to the battle link: https://splinterlands.com/?p=battle&id=3183d844a060c2edff3d30d841cdeafd8f042ff5