[Dravenguild]

Omit that last portion.

So I think you should take out the normal marines for another squad of Rubrics or possibly more Khorne.

Switch the lord to a biker and either keep the Tzeentch mark or the nurgle mark. (Both are good)

Get Havocs, with autocannons and missiles and lascannons, you'd find the best setup through experience.

The fickle thing with this is, all tau are really dakka so shooting contests are more in their favor for range. (But still worth it)

But the time it takes you to get into CC with those space smurfs you might have relatively thinner numbers, still worth it though as even 5 Khorneys will shred their suits.

So take those two approaches into consideration, because there is no middle ground. (I think at least, played enough tau to work my own strategies)

Not sure about running termies, you can certainly get input from someone better here.