I'll be running the same three or four tube rotation I've been running for the past like 11 years,,,,,,, just with a few more patches on them. Sorry I'm not a big help, you would get a kick out of seeing my tubes though. :getsome:
spare tubes are for races, buy a bunch of patch kit's and you'll do fine and save a ton of money. well maybe more like $20, but that would be a ton to someone living in calcutta.
If for some reason I don't go tubeless this spring I'll be running the Maxxis Ultralight tubes that are half the weight. No personal experience on them but the weight difference is huge. $8 though.
If you are getting thorn flats than Slime makes some sense. If you are pinch flatting a slime tube just makes a big mess. I think they can seal a small pinch flat but I have seen quite a few green explosions on repairs that are no fun to change out.