Currently I'm at Early Madrid (scenario 5). Here are my impressions and tips so far:
- I habitually play with Retrograde (new unit types becomes available 6 months later than normal). This is challenging when you start the SCW, because many German pieces are unavailable until later in the SCW. As of Toledo, at September 19, 1936, I am only receiving resupply of the Panzer IA, the 7.5cm and 10.5cm artillery, and the Rayo scout plane. Many of the basic units (recon, AA, AT, aircraft) appear only in July of 1936 by default and January of 1937 with Retrograde. That means the second scenario by default or the seventh scenario with Retrograde. Capturing equipment is absolutely vital. In scenario 5, Early Madrid, which takes place in November of '36, my fighter corps is limping.
- I also play with Slow Modernization (can only upgrade 3 units per scenario). This adds management difficulty because the shifting supply situation means I often want to swap equipment out. Instead I buy new units with the equipment I need and put the more experienced but depleted crews into reserve. This is not a bad thing, since I will need more crews when my core capacity starts to expand, but it does make experience gain slower.
- Field Repairs heroes are exceptionally good in these circumstances, because their repairs do not come from your stock of units.
- Gift units are even better than normal because they have unlimited stock. This includes the 3 Ju 52 strategic bombers you get at Antequera. I have been using them as bait in the air war because I don't have much room to lose tactical bombers.
- Auxiliary units are also constrained by Limited Stock, which I suspect curtails the value of the Auxiliary Force general trait (I'm not playing with it myself, but I'm having a hard time filling the default auxiliary space with Italian infantry). This is a bigger limit for auxiliaries than it is for your core forces, because by definition the auxiliaries disappear at the end of the scenario and the stock is not replenished with those units - it's as if they were destroyed.
- There is a quirk here: Auxiliary forces that are given to you by the scenario (i.e. ones that are deployed on the map when the scenario starts) normally replenish from your auxiliary Limited Stock just like the aux units that you buy yourself. However, if the auxiliary unit is one you couldn't purchase yourself, it functions like a gift unit and has unlimited replacements. An example here is the auxiliary Italian flame tank you're given in the Merida scenario - you can play recklessly with it because you have unlimited replacements.
Now it's different. Now I am very careful about exposing my units. Now I'm not receiving aircraft resupply (yet), so I'm exceptionally cautious about the air war. Now I encircle enemies carefully. Now I have deployed the sub-par He 45 german biplane bomber because I am low on the superior Hs 123a biplanes. Now I am desperate to capture enemy aircraft. Now, before replenishment, I check my purchase screen to see how many units I have in stock - can I afford to replenish, or should I rotate this unit to the rear for the rest of the scenario? Can I even afford to do that with a core size of 40? Will I be able to capture enough enemy AA guns to form a full unit to replace the german-equipped unit that I carelessly allowed to take 4 losses? My sense of what I'm willing to sacrifice has shifted in a very welcome way.
I enjoy all of this very much. This is a better game, in my opinion. I feel much more like the commander of a volunteer force fighting in a foreign war than like I am a general of a country that is a full military ally of Spain with the full backing and might of the Heer and german industry behind me. I recommend it.