Remember, this is my opinion. You can disagree. Tell me your list in the comments!
5. Skeletons
Best cycle cards in the game? You can cycle them in the back. Their also pretty good on defense. They can pull, distract, etc. Only 3 tho so I put it on 5, but their pretty good at cycle and defense. After their done if their still alive place a tank ( usually miner is good)
4. Tesla
Underground, earthquake can damage it so I put it on 4. But yeah pretty good building on defense, counters a bunch of building targeters and long rangers too. You can walke it up with skeletons or something like that tho so ur long ranger can hit it.
3. Electro spirit.
Sorry, ice spirit. Both spirits are 1 elixir and commons. I chose e spirit because it's chain lightning can connect to something even if that is not in a tile of another card ( sry if this sounds confusing) and ice spirit has splash. So for example e spirit jumps into the skeletons that are right next to the tower the chain lightning will also hit the tower. Ice spirit doesn't do that, but I still chose e spirit instead of i spirit. But most of you guys would say i spirit.
2. Minions
I almost chose bats, but minions could be better since they don't die to zap ( unless 2 levels under). Great for counterpushing and killing cards.
Knight
Knight is the best common imo, since it's a tank and pretty good on defense and offense. You can tank with it, and you can also kill fireballies and other things with it. Overall a pretty good card. Fast hit speed too.