As I write this draft, note that I have not "resolved" this level, even by dint of ferocious cheating! I may have a speed issue, or some fundamental strategy issues.
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The scenario begins with an intro movie/interactive timed area.
The orcs infest a large area of the map, but are removed forcebly from the left half of the map.
During this small interlude it may be possible to "save" a few workers, but it may or may not be energy well spent.
Divide the map into a left half (hostile) and a right half (neutral/friendly.)
1 5 2 6 3 7 4 8
You are left with inhabiting the right side of the map (east of the river, areas 7 and 8 on the chart below.) This area includes a basic amount of infrastructure and a small gold mine. There is another gold mine between area 6 and 7 in the chart below.
Area 8 has a ford that should be guarded urgently.
Area 7 has a ford that should be guarded urgently.
Area 6 has a few owlbears (2 encounters, 3 each.) Area 5 leads to a ford, and a jump gate. Area 1 includes the magic fountain, a major plot element. The fountain is protected.
Areas 2,3,4 are infested by elves, and Cenarius.
The elves periodically send forays of footmen, riflemen, and arrowpults across the fords.
Periodically dragons/chimera fly across the rivers, primarily at fords, not not exclusively.
--- Using keysersoze and iseedeadpeople, and fortifying with an obscene number of arrow towers has led to a stable border... but the dragons/chimera mean that the towers need to be along the river in a depth of two or three, AND among the infrastructure, in case the chimera have a "breakthrough."
Bulk attack against area 2 (hero+max flunkies) in two or three pushes leads to a victory in that area, which contains a goldmine. This area is subject to random flyovers by chimera, etc, and is difficult to secure.
Any succesfull (major) attack on a camp will result in the appearance of Cenaurus.
?-Make the attacks small, kill two or three buildings, then run away. ?-Kill select building to hobble attacks on you.
Puzzle 1: Defending your home against initial attacks. Put a few arrow towers or troops on each ford, against the initial attack.
Puzzle 2: Getting to the well. Straightforward, hero+ small party.
Puzzle 3: Defending against ongoing attacks and building up to battle.
Puzzle 4: Attacking the weakest camp (maybe the top-most.)
Puzzle 5: Defending against airborne attacks:
Puzzle 6: The next camp...
Puzzle 7: The final camp
Puzzle 8: Cenaurus. BLOODY STRONG!