Nderitu Gachagua should be able to walk in Nyeri. Thuo Mathenge is a great chicken farmer and land thief (talk to Mboi-Kamiti folk) not a governor.
Lee Kinyanjui would be good for Nak lakini Mbugua will get the Itna nomination. Njoro would have been good for Kiambuans, but they are fairly clueless so I expect Kabogo will get in.
Nai-Gakuo would have been good, but its looking like it'll be between the grory and Evans (he can't be discounted given his contributions to the OTM coffers).
Mombasa-Joho has it to lose. Who is standing against Kimunya in Nyandarua?
Mwangi Kiunjuri will take Laikipia
Michael Waweru will do a great job in Kirinyaga though he has the rat eater to contend with.
Full list here by the way
http://kenyadecides.co.ke/all-governors/The Governor of Nyeri - 2017