Round table

Both Tactics and Bless together in a real game on the first week don't occur all that often, especially in combination with 15 Water Elementals and Air Elementals each, and Faeries usually melt by the end of the week, so in a real game, using only native troops without offensive magic to capture it is almost unreal.

Bless is given in about half of the games. Tactics about the same. You don't even need that many Faeries; they all die from the first hit by birds anyway. Their job is to take the hit themselves. As for Water Elementals, yes, that stack is both damaging and bulky, 15 is a bit too many, that's only possible with an external dwelling (which is not uncommon, though).

In general, 1-2 external dwellings of Elementals, which are placed on respawn quite often, will suffice for a critical mass of the army here. And if you get 3-4 external dwellings of Elementals, then Bless is not really needed anyway.

To get specific numbers, testing is required, but I think in at least 1 out of 3 games the layout will allow capturing the external dwelling of birds on the 1st.