As for logistics, I only once tried playing a campaign map without it and regretted it. I do like it when the main hero runs around a lot and far, provided that the enemies are cowardly and often run away from you; this is extremely useful. Well... so far, no one has given me a hard time in the first week)), I'm also playing with a hero, and I've reached the 3rd mission, and that's where logistics is really important)).

In the third mission, you don't really need to run around much. Just stay at your Castle, buy heroes, and level them up to 22. When Rutger and other level 3 enemies with a two-week growth rate start attacking, that's a victory. Logistics will only help you run around the upgrade locations faster. Reflection is significantly reduced, but it's better than nothing. Artifacts for luck on a Necromancer without magical luck are a rather dubious acquisition.
And I find the chance-to-hit mechanic in spell combat annoying. For example, after a normal cast, I leave the enemy with 2 archers, then I summon Hydras and exit without losses. But luck, according to Murphy's Law, will work exactly when it's not needed, and as a result, I'll lose Hydras. Unless resistance from luck is very useful here. It's not reduced by race.

Now I understand which mission we were talking about when it comes to getting a hard time in the first week. :D I completely forgot that the 3rd mission is just a nightmare. I remember this from when I was playing as a Warrior; I decided to try it as a Hero the other day, and it's just awful. I've replayed the first week many times, but I can't even finish it! After defeating 3 heroes, Leto always comes with his plague, and I can't defeat him. I simply don't have enough units. I've tried different tactics, putting one Assassin at a time in battle; I even managed to avoid losing almost any of the Minotaurs before Leto arrived, losing a maximum of 5 Minotaurs. I had 27 Furies and 25 Assassins left when Leto arrived. I had a slightly different start; I didn't take the first town on day 2 because Cyra had settled there with a large army, so I decided to ignore it and took the second Castle, killing 2 enemies along the way, who, by the way, successfully ran away from me, the bastards. After capturing the town, I upgraded the Minotaurs and Beasts, and just as I was about to jump into the teleport on the north, Leto was already waiting for me with a decent army. And even if I try to defeat him and survive with at least one unit, I still have another enemy hero on my tail, with an even larger army.

Of course, I'll try to defeat Leto for fun, but I'll have to replay it anyway.
PS I really miss artifacts for Earth and Air magic, because in battles, Earth and Air spells are most often used on enemy units