Adding manticores to the cities of Dungeon.

What do you think of this idea – adding manticores to the cities of Dungeon? In my opinion, this creature fits the Dungeon faction in Heroes 5 even better than it did in Heroes 3 (in terms of, for example, the Warlock's affinity for poisons and the overall dark and mysterious vibe). Also, the Dungeon faction looks rather weak when attacking cities because they only have one flying unit – the Necromancer, for example, has three (although the Fortress also has only one), but it would be interesting to hear other people's opinions. Perhaps it could look like this: levels 1 to 3 and 7 remain unchanged, the manticore is added at level 6, the witches (level 4 or 5) are kept, and then it's decided who to send to neutral – the Rider or the Hydra (in my opinion, it's better to send the Rider, but then the Hydra should remain at level 5, and the witches at level 4 with a basic growth rate (without a castle) of 4 in neutral)?