SCS Enemy Mage Spells

Hi, I posted a similar question re BG2 in the SCS V32 thread, so in the interest of not-quite-double-posting I was hoping someone in the know could clarify a thing/two when it comes to spell allocation and casting behavior in BG1 (w/ SCS V31 installed).

Am kinda stumped because it looks/feels as though the install w/ everything set to the highest diff is hitch-less etc., but there seem to be some “irregularities” in the types of spells mages have and use when compared to other play-throughs I’ve watched online. Maybe there is an element of randomization re spell-allocation, but the deviation from the patterns seems a bit too... deliberate.

Figure I’ll just list a few examples to (hopefully) illustrate what I’m referring to...

1. Krystin’s precasingt routine in the Underceller follows a certain order:
Shield
Mirror image
Minor globe*
Fireshield
Shadow Door
Stoneskin
[She then casts PfMW]

*In the two separate play-throughs I’ve watched Krystin actually precasts the comparatively non-trivial Globe of Invulnerability instead

2. Prat (in the Catacombs) doesn’t seem to differ too much actually but his first actual action is to cast Mirror Image even though this is part of his precast routine.

3. A couple of the more... daunting... mages have some peculiar spellbooks in my install as well:

(I) Dezkiel (on Ice Island) has GM in “blunt weapons”. He’s a lvl 7 Necro w/
- 4/5 lvl 2 spells
- 3/5 lvl 3
- 2/5 lvl4
- (Oddly/appropriately) 0/5 lvl5 spells

Weapon Proficiencies:
- Short Swords +++++
- Blunt Weapons +++++
- Missile Weapons +++++

(II) Davaeorn:

Lvl 11 Invoker

Spells:
Lvl 1.
5/10 memorized
- MM x4
- Shield x1

Lvl 2.
5/9 memorized
- invisibility x1
- Mirror image x2
- Vocalize x1
- Web x1

Lvl 3.
6/10 memorized
- fireball x4
- Remove Magic x1
- Slow x1

4.
4/5 memorized
- II x1
- Minor globe x1
- Stone skin x1
- Teleport field x1

5.
4/4
- cone of cold x1
- Sun fire x3

Anyway, apologies for the over-long lists... I’m mostly wondering what (if anything) could be causing somewhat tamer casting behavior, but I’d greatly appreciate any feedback from someone whose had more experience w SCS (this is only my 2nd time playing through the series w the mod). I don’t think I’m doing anything out of the ordinary during the installation process and am pretty sure I’m picking/selecting the desired settings etc. so if anyone else has noticed these variations... or if spell allocation/usage does in fact vary between installations... please let me know.

Thanks!