Get 8 rare mods without index

[Matsetes]

As just suggest the title, is there a way to acquire 8 rare mods for nightwave without having access to index? I read that the ones you get for reward does not count, is there a level where is possible to get them?

Can I fuse mods for getting rare ones? Does it count?

I'm actually at Jupiter with Europa done but I miss the second branch of the void. I tried a pair of runs in the void T1 capture mission, but I dropped none (from enemies or crates).

I'd really like to unlock the missing tier of nightwave before it ends, they're really important for someone in the mid game like me

[Matsetes]

34 minutes ago, RougeMagma said:

Just do other nightwave missions. For example, this week, I think there's one where you have to crack 10 relics. You should get at least 1 or 2 rare mod after you finished this one. It almost killing 2 birds with 1 stone.

Yes, I'll keep this one for second last (last will be perfect animal capture, that is extremely difficult for me now)