I tried playing this map for a bit.
I replayed the first week several times.
The most interesting option, it seemed to me, was breaking through on the fourth day with gargoyles, shooters, and fairies. Although I also broke through on the third day, but the losses were much higher.
Without using the market, I built phoenixes during the second week, so by the end, 10 of them had accumulated. I captured the titans' castle on 137 and immediately placed giants there. I didn't play further after seeing that I would be building a dimensional door (dimension door) on the first day of the fourth week.
Personally, I believe the most interesting option is capturing the Necromancer castle and obtaining the berserker...
And the strongest way to play this map was demonstrated by one of the best players in Heroes II (at least in the CIS) — a direct march to the Knight castle, capturing it, then by sea to the titans, where giants were built on 127.