New ideas, templates, and tournaments!

Judging by what you described, this would make the template imbalanced.

First, Necro is already significantly strong on Jebus Cross given the Necromancy skill, not to mention Pandora's Boxes with vampire lords are not uncommon.

Second, the strength of Conflux and Necro will significantly increase thanks to secondary heroes, and if you also factor in the Necro-Conflux treasure zone, it's simply devastating.
This template is definitely not needed, at least in this tournament; please discuss a new template in another thread.

I disagree. Mainly, the presence of Necro and Conflux towns will make the game much more diverse: Earth Magic is the foundation of Soda, and very often the main hero doesn't get it, but now there would be an option — a university in Conflux. Agreed, that's fair, especially since you don't get Earth for free, but for 7,5k. From my own game experience — for Jebus Cross on Soda, that's not such a small amount. Roughly the same with the Necro town — I see no downsides — on the contrary, another option for development and tactics — through the Converter, which also costs 6k and 20 ore and wood to build — also a considerable sum, considering that these resources are mostly needed in the early game stage.

And the main question: what is the downside of having Necro and Conflux among the (non-starting) towns???