I've never tested it with sandbox so it is unknown. The magic mirror quest may not start at all in sandbox. Otherwise, free feel to try it out and if there are just one or two glicthes I may fix them sometime.
I'm not sure what you mean by new subspecies? The mod has no new slave races. To move new monsters to another version you would need to add the monster populations into explorationregions.gd, the combat data to combatdata.gd, plus my monsters usually have new abilities and combat effects that need adding to abilities.gd. The latest enemies also have their own simple AI (behavior) function in combat.gd.
Viewing post in Leo's mod for Strive v1.0
damn is not your mod who add some like werewolf, ogre and so damn was sure it was
but yeah i will tell you when i will encouter problem with the use in sandbox and so
then have a good one cause here it's pretty late
okay just to try have try some feature like the shop in the slaveguild of windo, and both in story and sandb got a crash when try to trade with
no message error or anything, crash instant in a sandb save, and on a new story save crash after few second whithout the shop apparing
and crash after wondering some time n(2 screen, 1 encounter)ear wind when cliking on process to the next area
to add mod i use
sex extended, some portrait and body
random portrait (not working)