The mini battlelord (and various ammo/weapons in the room) only appear on skill 3 or higher. As I see in Mapster, they are tagged to appear on skill 3 and since I always play on skill 3, they appeared for me.
Anyway, I've been playing through all versions of Oblivion since back in October 2020 and I managed to finish first two versions (in JFDuke3D, October 2005 release) 100% everything, last year and I'm playing through the third version currently, which I started back in July 2021 (it is played in EDuke32 1.4.0 beta 2) and it's my first time playing through the third episode and that's why I had to ask a while ago in a PM, both TheDragonLiner and Doom64hunter regarding some maps in E3 and their inaccessible secrets. With their help, I have discovered there are some unreachable secrets and it appears that in some E3 maps, there are alternate paths where you can't get everything in a single playthrough, so I may have to replay those particular maps later (from a pistol start) to get to the alternate paths and get the FULL experience of the mod!
Note that for first version, I had to use JFDuke3D because when I tried in Atomic 1.5 in DOSBox, it said that the CON files are too large. For Oblivion V2 and V3, I had to replace the included executable in both cases, because in former it used an outdated version of jfduke3d (which I didn't like) and in latter, it used an older EDuke32 (version 1.3.1 or so), so I thought about upgrading it to latest version of EDuke32 from 2006 (before EDuke32 switched to SVN builds). Don't worry, I know what I'm doing and other than a couple of random crashes while playing V3 (mostly in some E3 maps), the mod works fine. The only downgrade I noticed in V3 is the shitty pistol accuracy, I can no longer accurately hit targets, so I must use shotgun most of the time (at least ammo is plentiful). I haven't gotten into V4/latest (2009) version of Oblivion yet but I have been told that there are also updated maps from prior episodes, which is why I wanted to play through all versions. The only version I no longer have is an apparently less known updated 2014/2015 version from Zaxtor's website (which I used to test a few years ago when reporting the Muddlelizer bug) and since he passed away (RIP) back in 2019, that version is no longer possible to recover, even with Wayback Machine. I wish I still had that version saved somewhere in my PC!
Now for the last map I played and finished (E3L6: Bizarre Zone) two days ago, I found 10/11 secrets (with help of Mapster), so I talked with TheDragonLiner through PM and he told me that the missing secret could be linked to the alternate path and he also told me about the alternate paths in E3L11 (second secret map, which I suffered through) and that when you finish first map of the episode, you can only choose between normal or secret exit and can't do both in same playthrough. Now I know at least that I can't get full 100% in the third episode and it requires playing through those particular maps multiple times to get the alternate paths. Not to mention at least two unreachable secrets in two different maps. Maybe Zaxtor didn't care for getting all kills/secrets in the same playthrough or these maps weren't playtested enough. The maps are already painful as they are right now, at least most of them. That's why I'm glad I've been saving often and using multiple save slots, with 1-2 backup saves from end of previous maps.
And finally, in regards to that glitchy Mini Battlelord (from beginning of E3L6), I HAD that feeling that he is supposed to drop the card. But the problem is that while I'm fighting him or when I'm about to kill him with shotgun/RPG, the game crashes! There is nothing I can do about that. I tried at least 3 times and I was unsuccessful. I was able to kill him with Petrifier (Freezer replacement) but then he didn't drop the card and this created a side effect where after shattering him, his corpse could still be seen and interacted with, at least for a while. Then I also experienced some troopers' lasers remaining in air for a while and that pipebomb box on ground still remaining after I picked it up, then later the problem cleared itself and after I teleported to next area (after using the yellow card), I haven't experienced anymore weird stuff. Other than that void area with red cubes randomly crashing the game at times (and holding the crouch button while falling on the platforms, would result in me clipping through the cubes and falling into the void). I don't understand all the weird stuff going on at times but other than that, I seem to progress quite well. I will continue with the remaining two maps of E3 and once I finish it, I will see with replaying those maps with alternate paths and then post here if I have more questions/discoveries or other weird stuff I have seen. Once I start playing the latest/V4 (from 2009), I am planning to write a complete walkthrough for the mod to help everyone else here. I will try my best to give hints and help others complete the mod, secret locations, etc. Basically expanding upon the hints provided by TheDragonLiner. The hints were very useful for me throughout E3 and I'm sure they will continue to be useful throughout E4 and E5 as well!
If anyone is interested in experiencing older/original versions of the mod, you can find them here:
https://dukeworld.co...nt/tc/oblivion/
JFDuke3D (October 2005 release):
https://web.archive....3d_20051009.zip
EDuke32 (1.4.0 Beta 2):
https://dukeworld.co....4.0_beta_2.exe