Tower tactics.

In my opinion, the Tower is one of the most challenging Castles to develop. Especially when playing on a small map against an experienced player... (of course, if you don't use the overpowered Solmyr...). I see the main strength of the Tower in the Nagas – they are truly formidable. But building mages, if I remember correctly, requires 5 of each expensive resource!!! I haven't played on a difficulty level lower than 200% for at least 5 years, and if the map isn't rich in resources, it's difficult to progress beyond Golems... Of course, if there are resources, you need to quickly build Nagas, and the outcome of the battle is almost decided. Giants... it only takes 5000 to build them =). That's cool!! but they become Titans quite rarely! It's often not possible to spend 25000 on an upgrade! Considering magic as an advantage... Well, again, only on XL... usually, the Mage Guild for any Castle stops at the 2nd level, or even the 1st... the most useful spells are in them!!! or rather, even in the first level!
In general, I've outlined the disadvantages of the Tower when playing on a small map with limited resources...
The tactic in this case is to upgrade Gremlins as quickly as possible! take them with you and Ghouls (if possible, also upgraded), and use this composition to search for resources. Golems are ideal for defending the Castle! I guarantee that no one will be able to break through them at the beginning of the game!!! As soon as you've gathered resources, build Mages, Djinns, Nagas, Giants... Upgrade everyone except Giants (or maybe Mages), and easily defeat the opponent... usually, by this time, the hero has Earth or Air magic - during the final battle, slow or haste spells can decide a lot, you don't need me to explain that... Well, if you're playing against Elementals, it wouldn't hurt to level up Fire magic for any Castle, including the Tower.