Hi and welcome to the game DrkShadow 
As 7eknoo says: “Best” is that it’s quite a broad definition
Just an idea , not sure if it works for you ( I’m not your level , so it 's hard to put myself in your shoes )
1 - Your hero with yellow weapon (eg sunbolt javelin )
2 - Goblin
3 - Siren or boar rider
4 - Templar
(no red use but it’s better for the templar)
You show that you already use goblin , so why not combine with templar
This is a shooting team , but I can not find a generator team gold
Here’s a link that will allow you to see the possibilities of your troops according to their level:
Hope this helps you
Have fun 