First of all, let me clarify what I'm talking about: the HE forum already has a good tactics section (thanks Captain Sarathai). I'm not talking about that. I'm thinking more along the lines of the Red Harvest Tactics in the Necron subforum.
The idea is that, as a whole, we could look at/discuss different units strengths and weaknesses, tactics, etc. It would include a poll where we could vote on whether a unit was great/good/poor/terrible etc.
It would also include trying to make something work, so don't write off swordmasters because white lions are .00000000000000000000000000000000000001 kill better in most situations etc. (that could be our first unit of choice) We could also spend a week looking at a magic item (what would you pair it with etc.) or a lore.