New SS 6.4 HS: preparations thread (2 turns per week)

[Vipman]

Don't know very much about SS AR system but I did observe missile and cavalry units got up to 2-3 secondary hp while infantry 0 or 1. Secondary hp is not the main hit points you all know, it's a secondary hit points value, left over from RTW where it was used for elephant hit points, in M2TW it has no effect in lead battles but it has effect in AR. Otherwise this is probably the biggest improvement I see, along with the way unit stats were done, like spearmen having much lower attack value compared to vanilla.