One of the biggest problems in the breed in this country is that people buy dogs and breed them together. Period. They own the dogs, so they breed them.
For your goals, the male is probably not the best cross for the females. For producing nice average companion dogs, the DDR seem to be very popular....for working dogs, I personally like some DDR in the mix...but not 3/4 of the pedigree...the DDR x Czech may be a decent combo...but if you want to produce good working dogs then prove the dogs first, breed the females to proven producers, looking at those pedigees with an eye to the future to cross back to the male if that is your goal, keep back females and title them before you use this male....by the time you have done this, you will be in a better position to understand if the male is complementary and compensatory to the females.
I made one male Sch3 KKL etc, and never had a litter from him, I finally have had a litter where I think I want to use a male - and purchased a puppy from Europe with an eye to using her with a homebred male....after about 15 years in the breed.
Csabre Sch1, Hexe Sch2, SG Bengal, Lynx, Komet, Kira HGH & Kougar v Wolfstraum ~ Ziberia IPO1 ~ ATB Basha, Kougar & Kyra, Fenja, Sch3s, Cito, Sch2, Danger RH & Alice Sch1s ~Kelsey