There is no reason to replicate the official manual. It is huge. To wikify it would take too much time. Also the official manual may be subject to change. Who will maintain it?
I vote that to eliminate redundancy, we remove the replicated internal manual.
More useful is a summarized manual integrated into the strategy guide. E.g. Currently we have Gods: benefits per level. Races: pros and cons at a glance.
This is much more useful as a reference.