Rise of Fenris modules (spoilers) and Constantinople in standard Scythe

As a new Scythe player, there is a ton of information out there about faction/mat combos and openings. Our group has begun introducing new content to our table each time we play and we have recently finished a Rise of Fenris campaign so we have everything unlocked.

Disclaimer: We also understand that Fenris, Vesna, and Constantinople aren’t regularly available digitally so they don’t have the same number of games competitively as the other factions do.

My questions is twofold:

1. When you are playing Fenris, Vesna, or Constantinople on the original map (we have not moved to modular board yet), do you treat your mat as if you were the home base of the faction you’re occupying? For example, do you approach Fenris Industrial in Nordic’s home base roughly the same opening-wise as Nordic Industrial? Obviously the abilities, mechs, and (in the case of Fenris) Enlist bonuses are different but I imagine the openings are fairly similar for the most part. The exception may be Vesna where the custom mechs can create a very different game regardless of your position or mat.

2. Where do you all find Fenris, Vesna, and Constantinople in general strength? Obviously Constantinople hasn’t been out too long but I imagine Fenris and Vesna have been evaluated somewhat, even if they haven’t been examined like the old factions have.

Any information would be great!