Talk:Dragon/@comment-1599950-20151016061646

IMHO, In terms of DPS and Health of dragon and defense,

1 Air Defense = around 4 Dragons, 1 Tesla = around 1 Dragon.

Example, a town have 3 AD and 3 Tesla,

Then You need 12 + 3 = around 15 Dragons.

With Lightnening you can destory 1 AD, But still you need 11 Dragons to score 3 stars.