Pretty much this, unless you've got really good weapons you can't take him down alone.I was running a derelict mission for mutagen samples, everything was going good until suddenly I was fighting Grineer instead of infested, which I was completely unprepared for. Level 28-30 Grineer are no joke, especially when you come across a dozen of them. I got my face handed to me. I'm pretty ticked off about that cause I'd already found like 4 mutagen samples and I was only halfway through the mission.