I honestly feel like Infernal Dragon needs a new effect
The damage increase is just too good in certain comps. And with this meta, pretty much every meta comp is gaining far too much from it.
Infernal is creating extremely contested dragon fights which is definitely a good thing but it's doing so for the wrong reasons. Risking everything to contest a dragon solely because the effect is broken and the other team shouldn't have it should not be the main reason for taking it. It should provide an effect that you'd really want to have and not have the enemy have but the current effect is one that you absolutely need to make sure the other team doesn't claim.
However, I honestly don't have a good solution or even suggestion for a replacement.
. mountain is also good giving a base 10% extra tower damage and the other two are just out of combat passives which make direct buff and wins very RNG dependant