Glad you like it
The Droyaska sounds pretty interesting, what did you have in mind in terms of rules for him to separate him from normal fighty characters?
Some fluff I found about him, might be of some assistance:
A Droyaska, or literally, Blademaster, is the greatest fighter in the Kislev nation. It is a title that only the Tzar himself, or the Tzarina herself can grant - and more often than not, entire generations will pass by before a new warrior is worthy of the title of Droyaska.
They are the equal of any they face - Chaos Warlord, Vampire, Orc Warboss, Ogre Tyrant - all have been fought, and triumphed over by a Blademaster. Their speed with a blade is blistering, said to be only bettered by the Elves, and even then, many doubt that.
A Droyaska is a title, which unlike those to the Imperial Generals and Templar Grand Masters, is not bestowed by skill with wielding troops, but purely by skill with a weapon - be it knife, long sword, spear, bow, or fist.
Usually, the Droyaska is a personal champion of the Tzar before they become a blademaster, almost undoutably rising up from the ranks of the Gryphon Legion. If they so wish, and the Tzar or Tzarina is willing to lose their bodyguard for often many years, their ruler will provide them with passage to far off lands, such as Cathay, Nippon, and Ind, to perfect their skills. When they return, they are often changed men. Stronger, and more haughty than they once were. But subtly, they have a greater bearing.
The teachers and sensei's of the East do not teach battle tactics, although many in that land do teach of Tsun Zhou and his lessons - the time they spend is purely on the Droyaska's blade work. They are foes to be feared, and when leading a cavalry charge of some of the strongest horsemen in the Old World, absolutely terrifying.