The Mana Challenge in Soulkeep
Using Cards in Soulkeep that consists of Towers and Spells and also hero but as we are in league 1 so hero is not mandatory to be used so depending on towers and spells is the main thing in soulkeep levels on league 1 that from level 1 to level 5 and the more you be familiar with those towers and spells that you have or buy from the market, the more you could control the level.
Level 4 is not easy and it is due to low mana and that is in first waves so you can not use more towers and also more spells with these low mana so you can use different options to overcome this problem and this is by using common towers that could be used with low mana and have a good options.
What I can else do it to use cheapo in the first wave so I could use more towers and in turn I could kill more fiends and gather more mana and this is what I have to do in the first level and after that in second and third level while killing more fiends, I would have more mana to be used in the battle.
So whatever you have to do is to pass first waves without losing hearts or using less hearts in this case you could gather more mana and could complete the level with ease and this is like when you move your car so it is slow at first then it would move fast after that and this is with wave when you start the level you find it is slow and hard to pass while when you move to more waves, you would have more towers and spells that are in the ground in addition to more mana to be used.