Which challenges would you swap if you had unlimited challenge swaps?

Games Halo Infinite
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1

I’m a clerk at circle k and I’ve been taking the 5 challenge swap bundle from every customer who buys two rockstar energy drinks, and have amassed an absurd amount of challenge swaps.

I come across challenges that are not very specific and initially seem possible to do in a reasonable amount of time but I’m starting to see that they don’t budge for very long times.

Which challenges have you learned so far that are better to skip than to try and complete?

2

Kill _____ scorpions/wraiths.

3

Mangler kills. That one goes in the bin the instance it pops up.
First time I had to get one kills, it took me five matches to get even one despite going for it each and every time.

Second time I tried for four matches, then swapped it.

Last time I had it, switched it immediately.

Spare me the tips on how to do it.
I’ve seen them, I’ve tried them. They just don’t do it for me at all.