I just loaded up my last save. Was playiing the robot with the dwarf as an ally. Looked around town, found the alien and the knight. Accidentally recuited the knight (translation goooo!). Well, at least he can heal. I think I only had the dwarf because he was good for autoattacking while I grinded levels with massive frameskipping. Went to the nearest rune. Most enemies couldn't really hurt Lux, but could smack Kamil for 20-40 hp. He had enough mp to heal 10 times for 40 hp each time. Heal 2 was there also but it cost over 4 times as much so basically useless. Lux has ~100 hp and Kamil ~77 for reference. Explore the cave, find wind rune, exit out, warp to latest town using it since I have no idea where to go. Been here already, thrashed robo place, everything looted. Must have missed the rune on the way here and backtracked. So I go through the nearest door, into what seems to be the cave I just left (all looks the same, same enemies) but there's a yellow dot on radar, so I go to it. Hit level 14 on the way for Lux (this is after like dozens of battles between the cave and the giant desert on the way here). Unopened chest. Open. Mimic. Heal Kamil to full hp in case it's strong. He dies in 1 hit anyways. Lux would have died in 2 but barely survives thanks to a lucky crit, poisoned. Used items to heal. Went back the way I came, through other end of robot town. Another cave, looks the same, same enemies. Some dude standing there. A boss (not a companion). I figure I'll fight him just to see how tough he is. Hits me for 60-80. So he would have one shot Kamil, who has like 20 less defense and only 80 hp. I'm hitting him for 13 out of apparently like 200 hp.
So yeah, I'd need to grind for like another 50 fights to get to the point where that fucker can't just one shot my companion without even scoring a crit. Probably another 100 battles more before I can actually fight him, since getting hit for 70 and healing for 40 each round isn't exactly a winning strategy. Maybe the healer chick can heal better but she'd definitely get one shot at this level, and is either in some other town or not willing to join me.