Discussion about Sylvan (Wood Elves).

In this case, the foresters' initiative and the cleansing magic, along with mass acceleration, will help. Also, forgetfulness can severely harm the archers, and I consider the archers of the Sylvan faction to be the backbone of their army.

A lot depends on the spells in Heroes of Might and Magic; they might not provide what is needed. Berserk is not removed by Skilled Dark Magic, so if it affects the archers or those who protect them... In general, there are quite a few possible scenarios.
The archers of the Elves can compete in damage even with level 6 units, but they are very vulnerable, so you shouldn't rely solely on archers. IMHO, the Sylvan faction has very strong units at all levels.