Diabler
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If it's a full random map, then only changing the colors is an option. If you deprive your opponent of the right to choose a castle, then you lose the right to the red color. This is fair, and it has already been discussed for the M200 and Anarchy templates.
Added 3 minutes later
This needs to be considered; ideally, games should already be played on such a timer, at least in a fast-paced format.