I recently posted my Necromancer, his minions and the starter warband for Frostgrave. The cultist models I painted up a long time ago. I think they were painted (at least build) way back for the Thaw of the Lich Lord campaign.
It's a lovely kit. I build my cultist models to work on its own as a warband I would play - and cover what's needed for the Thaw campaign.
As with most of my FG boxes, I only build 10 models. I sold off the other half and made back on my investment. I'm a trader - also hitting at getting near free models left for myself.
When painting these I've used different greys and browns, and three different purples. Some were washes with purple wash and others with brown. To add different tones all over, but keeping them uniform.
I decided to not add snow on their bases, as the models work very well for other games too. Could be used in Guilders or Nightwatch.