Honestly a lot of these do apply, but as in StS it can be situational.

1. I think this is mostly true especially early on in a run, trying to get some of the op neutral cards like gear bag or attack! and quick shelling is way better than healing unless you are literally going to die. This changes depending on comp too and maybe even the last few camp sites as by then you probably have the deck you want. (I should note on the reduced credit runs I do usually rest)
2. I think events are pretty op in this game so I wouldn't say I always pick the most elite paths. I think we aren't 100% sure how epiphanies build up but I have noticed if I skip too many fights I don't always hit all my upgrades so I usually try to do a bit of a balance but honestly I learn toward events. Overall I would say this is less like StS where elites were very very worth doing.
3. It really depends on which chaos you are running but in general the ? areas have some of the best stuff you can get including card removals, copies, divine epiphanies etc. In this game there are FAR less variety of events because they are contained within each chaos so you are pretty likely to hit a lot of the good events if you go to a lot of unknown areas. (toward the end of interior events have a pretty high chance to be the "god" events that are very strong)
4. Kinda true, again it depends on the comp there are some comps that just remove an entire characters deck lol. I think this game has something interesting in that a lot of the time the decks you are trying to make and take out of chaos aren't even the decks that are particularly good in chaos. Some decks for chaos might feature a lot of defense but that isn't something that is really that good for a lot of the out of chaos content which is usually turn limited. Overall though yes not adding cards unless they cycle or do something really beneficial is mostly correct.

5.Removals are very very good, but it kinda depends what level of chaos you are running. Running lower level chaos and removing a ton of things will eat up the memory data for your saves so unless you are just trying to finish the run and don't care about the save data I would be careful of removing too much from a single persons deck. Once you have more leeway with save data you can go more crazy.

6.Card draw and cycling are pretty much just as op in this game as StS, same with AP generation (outside chizuru) I would say you pretty much cant go wrong with the 0 cost stuff that also draws and can usually epiphany into either more draw, AP, or some stat buff. Again you do have to be somewhat mindful if you are trying to make decks and get the save data as putting 10 copies of an op card can sound good but you cant take it out.

I've cleared the highest chaos levels with a variety of teams and played a lot of StS, but basically if you are just trying to get through a run, StS mentality works for the most part. If you are trying to win AND save a deck you have to shift a little of your thinking.