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1) Regarding banned heroes – not all specialists in 3rd and 4th level magic should be banned, but only those with 4th level combat magic – Meteor Shower and Chain Lightning (well, even Restoration is questionable, as it is allowed on other resources). (Because specialists in prayer or magic are not overpowered against dragons, and it is possible to allow them to be leveled up without any restrictions).
For the 3rd level, the restriction should only be applied to Tanta (it is forbidden to use Resurrection against an opponent until the guild is rebuilt, but it is allowed against monsters).
For the 2nd level, they must be disbanded, the same applies to Necromancer specialists – if they are released from prison, and if they gain +2 levels, they must be disbanded (it would simply be unfair if a player goes to the prison, breaks through its defenses (and for heroes of level 10 or 20, it can be very difficult), and has to disband the hero because he is banned (but he usually went there to either participate in this hero in a chain or to take something instead of a folder, and here is such an injustice, the hero must be disbanded).
Regarding Cielke, Grindan, and Luna (as for the specialist in Ice Bolt – there is nothing to say here, he is a completely ordinary hero) – I would not ban them, magic is not as powerful as the 4th level combat magic, and it will not defeat the opponent's army with one or even several casts, and mages should also have their own Greg Hacks and Tazars.
Cielke has a ranged attack of 60 from the start and enough mana for 6 shots. And after gaining a couple of levels, the ranged attack will be 100, compared to even Solmyr, who has a chain of 110 and mana for 1 cast, Cielke looks much scarier. Luna – if you conduct the battle skillfully, you can defeat 7 monsters in the early days of the game. Grindan is not banned yet, but I would also remove him: the starting earth with slow is a cheat :)
Regarding various Dragons, Mutare, and others from Wog – I would not even write about them in the rules, as Wog is a different game.
(and these heroes will never appear in random maps, they may appear in fixed maps, but we don't play on fixed maps).
excerpts from the rules
Online battles are held on any version of HoMM3.
These rules imply games on random maps, but games on fixed maps will also be taken into account in the rating. If a report is written and confirmed by the opponent.
2) And regarding the upgrade of vampires – if it's about the bone dragonlings, I can assure you that I will almost certainly use them in the first days of the second week.