So, what's the problem?
If a more complex option is acceptable, are you showing your stubbornness?
I'll make a disclaimer upfront that Heroes3 didn't definitively state SoD + sm4d3(?).
Whoever declares what rules (within the framework of Heroes3) is their business. Personally, I'm ready to learn unfamiliar rules and prepare a team for them if it turns out that we don't have enough specialists in those rules. I expect the same willingness from the coordinators of other teams.
If you think that the difficulties are only on your side, then you are greatly mistaken. I expect a certain amount of trouble from the League and WCL; their choice of rules may be much less familiar to us than SoD and sm4d3.