Welcome to Librarium Online!
I like the idea of the crazy Celtish Warboss and retinue who charge screaming into battle wearing nothing but blue paint. It's also a very easy conversion, take a standard slugga boy and put some blue paint on him, and call him a Nob with Lucky Tattoos (cybork body for point cost).
Would this be a reasonably survivable unit, or would I do better going with 'Eavy Armour and just tattooing the Warboss?
quite a difficult question to decide, i personally dont believe in giving a Nob any armour at all why? he cant be singled out in most cases? im sure someone will prove me wrong....anyway id take the tatoos, i mean there are way too many weapons to punch throough a 4 plus armour save so might aswell get an invulnerable one for cheaper cost and is more fluffier. And ofcourse tatoo the warboss does the same thing as a cybork body, its half the cost and its more fluffier.
well, the blue is a paint that the Deathskullz use and they are Lootas by nature for that reason. but the blue is a lucky colour to them as well. Also, they sound Feral more than Deathskullz.
but your Nobz going into battle without the 'Evy Armour is a bad idea, i think. but! on the up side, they would look cool and quite intemidating. you would just have to be sure to use lots of cover for them so they do not get shot to pieces.
wWWwwAaaaAAgggGGGhHHHhhh!!!! = DeAth