Those old descriptions were leftover from a previous implementation and haven’t been necessary for many years, and were inconsistently applied to skills/supports. In 3.24.0, the actual skill popup for a triggered skill will specify that it can’t be used directly because it is triggered, and if it is disabled due to having multiple triggers on it, that will also be clearly communicated now, where before it was not.

With Back to Basics allocated, you can’t force mechanics on a map, even with scarabs. Extra content scarabs aren’t consumed when this node is allocated.

No, but you can still get above 20% quality from things like beastcrafting, tainted currencies and Perfect Fossils.

This will depend on how much you juice your maps as it scales with Necropolis passives and pack size. As a rough estimate, maybe 3 from a rare map.

64.

Yes.

Yes.

Yes.

Yes.

Maven’s Writs have not changed in any way and are still itemised drops.

The instance owner will always get the corpse. Other players in the instance at the time the corpse drops have a 50% chance to also get it.

It is added to the base mana cost.

You can’t get things like Eldritch Decay because Uber Elder Fragments are a boss drop, but you can get cards like Last Hope and Sambodhi’s Vow because Mortal Fragments aren’t exclusive to boss drops.

Tier 17 maps cannot drop Corrupted.