So, after rushing the whole starchart in Steel Path to test a few loadouts on higher level enemies that what the simulacrum provide, I start Mot (survival) which has a base 40-45 level that become 140-145 on Steel Path. After playing for about 15min, I noticed the level only went from 140 to 146, which sounds extremly low. I decided to do the same in regular mode to see how fast it grows there and it went from 40 to 46 in the same duration. So, it mean Steel Path level is "(base level * sca