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OP - You NEED the Firebase - preferred enemy against most power armored foes is a sin. Assuming this is your all rounder idea, which is looks like it is.
Drop the IK. Sorry but. I personally feel IK's are better as a multiple at this pts range. But that's from experience, and at 1850 honest critique is best, right?
As for the
GK side. Great. Best to be minimal here. Flamer always minimum on Dreadknights.
Consider Incinerator on Strikes though, 5pts can clear a unit from cover after deep striking Turn 1, top or bottom.
Last game I played (vs Tau Emp+Base) I scored first blood through one incinerator template.
If I were to run this I'd run the minimal
GK as you have, adding an incinerator though. Strike units don't last too long but one flamer can change a whole battle; seeing as
FB is VERY important as far as objectives go, trust me cover's a good tool and people want to abuse it.
Lv 2 on the Lib is usually a sin for
GKs but you are running the honest bare minimum and you won't be have many charges anyway so this is ok.
Really you're using
GKs as an excuse to team NDKs with Tau firepower.
Lol. Sorry. (I don't blame you).
On the Tau side. Firebase as mentioned.
No Knight, point sink, 1850 tournament level it'll get ripped to bits. (or should, depends on your hobby store play level).
I wouldn't follow the above idea of running 3 Riptides. Out of all the good Tau tourney lists 2 is usually the max; also from experience. Your troops could or should really be fire warirors for wound numbers really. But that's just me, also, cover is a blessing, as mentioned.
In my local meta our Tau players tend to run at least 1 jump unit of suits. And 1 suicide suit designed to blow up annoying tanks etc.
I'm just the
GK expert, Tau's not my forte, just going by one of my best mates advice and the stuff I see usually.
Side question - what's your usual meta like? I am assuming you want to use this in tournaments as stated in your opening post.
Anyway g'luck!