dredknight

I understand. This nerf is to hamper synergy of Vampires with other hero abilities or spells (Retaliation Strike and Celestial Shield) both in end battle and PvE. In the previous state Vampires are very high-gain-low-risk creature. This was unexpectedly raised by various members of the community.

We are open to any suggestions on how to adjust that strength into more controllable boundaries. So far we have not found any other.

 

And why is it necessary to weaken the synergy? There are a lot of them in the game, and that's good.

Winning the game is built on the use of strengths and weaknesses. If someone won using vampires under a heavenly shield, and the opponent did not find an answer to this, then this is not a reason to cut such a combination.
Disenchantment or anti-magic (if works on enemy), disrupting ray, powerful damage dealers with attacking buffs, stuns, weakening debuffs and/or high defense, destructive magic plus ranged attack, no-retaliation attacks etc.

There are so many ways to counter vampiric, or they doesn't work?

If the vampires still seem too strong, then you can cut their stats, but keep their profile ability (face). This way, IMHO, is better.
The weaker an ability plays, the less chance to win the game through its use, the less attention it deserves and the less interest it generates, and this is exactly the reason why I do not like weak abilities.