I have noted that recently a lot of posts have been trying to come up with ways to hold objectives claiming that we don't have the staying power to hold them in 5e.
I would have to say that this is dead wrong. While our options aren't as numerous or as good as some others (SM, CSM, Necrons, IG, & Orks) you have to remember besides MEqs we have the best armor in the game. To point this out lets go through the numbers between us and IG.
12 FWs Ld 8 vs 10 Guardsmen Ld 9 reroll.
Both have the same chance in cover to survive because on average you will loose 3 FWs (25%) and the IG will loose 3 Guardsmen (33%). They will have to take that Ld check but we will not "
... take causalities of more than 25%..." However their superior Ld will make them stay. After that we both will be taking Ld checks.
Outside of cover its a much different story. We will lose the same 3 FWs but the Guardsmen will lose 6+ due to their lack of armor. Now you may be telling yourself "well that's great Trentwolff you have compared us to IG and we come out on top but we knew that."
The point of this is that we start with larger squad sizes than IG, or most other armies, and then we can do things to boost those numbers of wounds and make it very hard to kill.
12 FWs +2 GDs Ld 8 Now we have 14 wounds in the squad which means that without focusing a lot of shooting we won't be rolling for Ld checks for at least 2 turns. Now lets add something more to this to make it even better.
Troop 12 FWs + 2GDs + HQ Ethereal + 2 GDs Ld 10, Fearless. Now this squad has 18 wounds (16 before having to allocate anything on the Ethereal) and is Fearless and going no where. I took this squad to Chicago GT 08 and never repeat never lost the entire squad throughout the whole tourney. Except in game 5 against a demon player but he wiped me out and took 5th overall.
Keep in mind that you should never be thinking "Oh man I need these guys to shoot."

They need to stay on the objective so don't be afraid to "
Go to ground" and keep them alive with more wounds, come late game when your fire base has whittled down there attackers you most likely won't get shot at anymore and be able to fire with the squad.
Another thing to remember is that with so many models in the squad you should be able to pick up more than 1 objective. Don't for get to try for this during turn 5 string them out unless doing so will get you charged.
The other objective HoldersWith the other troop choices you should be ok, with an Ethereal on the table you won't be running much. so take at least 2 squads of the following.
6 FWs (Ui BK) + DFT (GDs, DP) = 160 pts I took 2 such squads to GT and again never had anyone kill them off completely except in game 5 I had against a demon player but he wiped me out and took 5th overall.
Now you may be saying "Holy crap Trentwolff that is an easy squad to kill." The truth is that they are not. The DFT is very good at keeping them alive and with the minimum wargear on it they may not remember to shoot at it because its not firing at them. Just make sure that you take out the things that can kill them in short order and you will be fine. You also can't try to over extend yourself by trying to take objectives in your opponents deployment zone on the field. Yes this does mean that you won't be taking a second objective in "Capture and Control" but it also means that you don't have to. You can just as easily move up the DFT with the FWs staying behind as part of the firebase and disembark the GDs and make your Assault Phase move with your drones to contest or try for the objective with 1 squad but never more than that.
The other thing for these squads is that they should deploy as part of your gun line in
Annihilation and the DFTs should be kept back. Don't forget your GDs from the transports
they are not worth a KP direct from GW England. "
They are considered wargear for the transport and as such the DFT is worth the KP not the Drones this is to keep the Tau from having an overwhelming disadvantage during Annihilation missions."
The rest of your army should be dedicated to killing your opponent because remember that the best way for your army to live is to kill everyone in your foe's army.
As part of that I recommend that everyone should try to work in two Railheads and a 2 man BASS squad with SDs. That should go a long way to helping out your army kill whatever you need to kill.
Thank you for your time and consideration for this article of war.
--For the Greater Good.