What ridiculously themed list could you come up with if you had absolutely no restriction from the FoC or Codex? Goodbye, 0-1 unit cap or silly "what, only three?" Heavy Support options. For Tau would you take 1k points of Broadsides, IG a wall of AV14 tanks? The rest of the rules apply, ie. 50% reserve limit, nothing on the table at the end of a turn you're dead sort of thing. What would you do with your army at the 500, 750 or 1000 point level (or all of those points, if you've got that much time on your hands)?