Tactics for Rampart.

1. Wyverns are ordinary meat, the weakest creatures of level 6. Regarding the construction speed. For example, undead dragons can be built even faster, as well as death knights. Nagas and manticores are also built quickly.
2. Elves also have creatures with abilities that I think are no worse. And all the annoying creatures from the swamp are blocked by blindness and taken out one by one without losses.
3. Hydras are also meat + there are the spells of blindness and resurrect (restoration)

Hmm... well, how can I put it... maybe wyverns aren't the strongest creatures of level 6, but they are built immediately - even on a 200% difficulty, almost certainly in the first week!!! With a bit of luck - on the 2nd day! Understand this.... And by the time you get to unicorns, how much time will pass???
So, you are really wrong about the speed... The construction speed of wyverns is the FASTEST. There is nothing faster. And to build nagas, you need such a HUGE amount of resources... Nonsense... it won't work. In the 2nd week - this is the MAXIMUM!!! Or even in the 3rd week with difficulty. And manticores too. And death knights even more so. You have to build so many things before them that you won't accumulate enough resources! Believe me...

Further - regarding blocking with blindness and so on - I already said that the swamp has the highest chance of water magic appearing. It is easy to upgrade to expert. And almost 100% of the time it will be either healing or spell removal. So everything is easily solved ;) This is not a problem at all!

Regarding hydras - yes, they are meat. But meat with retaliation, with defense upgraded as much as possible, and hitting all enemies around:D :D :D Teleport - and half of the army of the same Rampart (covering the elves) - is deeply out of the game. ;)

And the elves are blocked by dragonflies on the first move. The enemy army flies to the dragonflies - they say, let's beat them - let them not interfere. This is where we teleport the hydras :)

P.S. I love Rampart and other races very much - but you can't offend a great castle - the Swamp. I'm just telling a tactic. Please don't take this as an attempt to persuade you or, moreover, as an insult ;)