I'm pretty sure Relius can fit in the same blindspot at Lambda can.
But you have only dealt with them a few times with Relius. I have gone through 4 games with Nu/Lambda and there is no answer to them beyond be lucky and hope the Bang threw them out at the wrong spacing.
Edit: How did you get by the raw Ignis's overhead? That was one of the most anti-climatic finishes I have seen.