Why would you want to risk your money in low cap coins? I get the attraction for low marketcap which can give you 10x-30x but look at how much it swings compared to safer coin. But if you had choose, I would recommend the following coins:
Cardano - Great platform and new coins are building off it soon. Way way below its previous ATH.
DeepOnion - Low marketcap with huge upswing. They hit their roadmaps every quarter and just released stealth addresses
Iota - way below their ATH and has survived most of the downturn compared to other coins. They are looking to be the blockchain 3.0