oldzoggy wrote:
Take a look at the wfb empire range, they have lots of cool models that would be ideal for conversions.

For army list use:

Inquisition ( for the diversity )+ all sorts of crazy Allies. There are lots of cool options out there.

I would not advice you to use counts as alien races etc. Use the always use the closest thing available and never let stuff count as a different faction. If you want field some cool tau units use tau rules. Your army would already be confusing enough for most opponents.

 TheCrusadeSmurf wrote:

 oldzoggy wrote:
Take a look at the wfb empire range, they have lots of cool models that would be ideal for conversions.

For army list use:

Inquisition ( for the diversity )+ all sorts of crazy Allies. There are lots of cool options out there.

I would not advice you to use counts as alien races etc. Use the always use the closest thing available and never let stuff count as a different faction. If you want field some cool tau units use tau rules. Your army would already be confusing enough for most opponents.

I fail to see how black and gold Tau suit with Imperial mounted weapons and aquilas everywhere would confuse factions.

You cannot mistake a true Imperial for some foul xenos!

 Elblondino wrote:
TheCrusadeSmurf I certainly do. Always wanted a Genestealer cult but never got round to it.

 oldzoggy wrote:
Well this

Fluff wise I was thinking of having a rogue Tau earth caste (counts as IG Techpriest)

will be very confusing. Sure you might make some nice conversions but most opponents will forget that it is a IG techpiest once the game continues.
If you want to field some rogue tau eath caste or some kroot mercenaries make some cool conversions but use actual tau rules for them. This can be just as fun to play, and might create a more unique army.