The current Weekly Hard Stratagem stacks Posthumous Proliferation (slain enemies spawn spores) with Mine Field (Spore Mines spawn periodically and fly at you) on top of the spores that already come with regular waves, plus everything Biovores lob across the map.
The whole mission is a sea of spores. So I published a full writeup on Spore Mines on my wiki which covers:
- Which melee attacks are safe vs dangerous for each weapon
- Which perks trigger damage that is safe vs dangerous
- Spore enemy behavior
- Spore chain detonation logic
The page also includes the interactive hitbox viewer, in case you were unsure where to aim on the spore mine!!!! Multiple angles shown!!!!
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TLDR;
- Heavy Attacks (charged/held attacks) and Sprint attacks are generally safe, most light attacks are not.
- All melee attacks on the heavy class are safe.
- On Power Sword, light attacks in power stance are safe, light attacks in speed stance are not.
- Be careful which perks you have selected, they can trigger add-on damage that will make an otherwise safe attack unsafe.
- Safe attacks can still cause spores to deal damage to your teammates, so be careful!