I hate these three

They are clearly out-numbered and without preparation. Unless some serious backup arrive, the chance they can win this is really slim.

9870713
How do you intend to get it up there?
...
I'm going to need a really big slingshot!

The G3 are easy to slay, I do it all the time with my tigris prime corrosive blast build, melts them like wet toilet paper. But I doubt that Excal has all of the good stuff with him or on his ship.

9871529
But I'm also trying to be realistic here. I have a 100% critical and corrosive status Lex Prime that tore them to shreds in a few shots the last time they attacked me. But in real life there are no critical chances or bonus damage.

9871531 But there are specialized ammunition and this being the warframe story you can just say that he can snag some special ammunition for his firearms or salvage ammo from the enemies he has killed.

9871531
9872328
Ah, I see you haven't run into them while lich farming. Picture this, squishy nekros prime doing some grinding for the reliquary identification stuff as well as some XP for the newly forma'd frame. Lich is level 5, level 100+ enemies. Taking them on no real problem. On the last wave of a earh tile defense, one of the mother fuckers spawn. At first, I wasn't worried, like you, I've killed them accidentally before. It took some damage, I got it about half way I think. Then I ran out of ammo. and since it's a defense, the enemies stop spawning. And if there's no enemies to kill, there's no ammo drops. And like a normal person, I don't have ammo restores in my gear.
Shortly after, it wrecked my ass, causing me to fail the mission.
So, with that in mind, I have a feeling Excalibur is going to have a really bad time. That's the aditude I'm looking at this with, the grineer are a much higher level than the current equipment can handle.

Great story so far. Haven't read since you moved it to mature. Personally, I didn't think the sex was necessary for the story to move forward, but I appreciate the detail you put into everything and leaving page breaks when those scenes are done so I can skim past it. I look forward to seeing how he gets out of this one.

10156651
Reading through my comments reminds me of the time I was ranking my Vauban after a fresh forma. Armes myself with nothing but my Detron. They were only level 30, but without abilities and minimal mods on that pistol, I had to rely on radiation procs to keep them from attacking me as I cowered in the corner, shooting everything I had.