So, I went and checked the DM mode, and noticed it isn't exactly what I wanted. However, I'm guessing it could be a first step towards what I desire. I noticed the DM has all spells, and all are available without refresh, unlimited. However, there are two things right here: I want to be able to use my playing character, rather than a pre-generated DM, and I also would like the spells to work as usual, refreshing at rest, or with limited time-usage. Also, the DM runs like hell, which is something I don't like, and has no selected feats available. I noticed many of the feats aren't present in such a character, so I'm guessing, either they become available as the DM character levels up. or they were never meant to be used, seeing as the guy can instantly kill.
What I originally wanted was to be able to manage the spells exclusive to other classes, like bard songs and divine enchantments. However, I expected to do it by choosing from the spellbook and following attribute specs like intelligence and wisdom. I've noticed the spellbook holds only three slots at the top, one for each class, so I'm guessing you can't actually make a fourth class be selectable; maybe it is hard-coded as such, but I hope it can be clarified.
The DM mode is too overpowered to play single player games (it was obviously designed explicitly for multiplayer management), but I have to ask, could some of this options, just SOME of them, be added to a character via LETO? I wouldn't want the invisibility feature, or the character speed, etc. However, I would very much like to have access to the cleric and bard spells.
Thanks again!