Stickybomb is a spell to be used in high fiends that have High Points and with it you could eliminate most fiends that have this high HP but with this spell you can not deal with weak fiends so I think it is not recommended in this league 1 as most fiends in this league are common ones and have the ability to Hit and to have some mana.
Other Spells that are in the market may not be used also in league 1 as you could read that it is triggered by high fiends and so on you could use it just for some specific use and for fiends that are epic and legendary that you may find at last waves of any level.
So if you want to use effective spells so you have to be with a good time and a good common spell for fiends that are common also and it deals a good damage as from these common spells, Venus Fiendtrap that you could use for all fiends and I have to use it for most fiends that could escape from towers and going to the gate.
One of Other Spells that are really good and I also I have talked about is Raining cats and this is a cheap one that you may use for a small group of weak fiends and in this case you can save mana and eliminate those fiends that are coming and this relieve pressure from towers and make their mission easier.
So every time you have a chance to use towers and spells you have to read its stats and you then be able to play well and to pass any level that you want in a battle and you could gain more mana and save your hearts and then will rise higher in leagues and get more rewards.
