If all you're targeting is henbit, dandelions and clover just get some 3-way. It's about 1/3 the price per acre and works great on those weeds. T-zone is only needed for harder to kill weeds like violets, sedges, and oxalis. At full rate it can definitely cause some tip burn because of the surfactant they're adding in with the sulfentrazone.
No one can tell you how much you need to add because they don't have access to your sprayer. You need to find out how much carrier you're putting out per 1,000 sq ft or per acre. Start with just water in the sprayer. Figure out how wide a swath your sprayer is doing on one pass... typical would be 5-8ft on a 2-3 nozzle boom. You want to overlap 50% for even coverage on each pass, (so every time you go over a bump or your hand moves a bit on your steering controls you're not leaving an untreated spot or swath). A good way to do this is to spray back to your wheel tracks on each pass.
Say your swath is 6 ft; measure out an area 10ft by 100ft to get a total area of 1,000 sq ft. Put a known quantity of water into your sprayer, say 5gal from a bucket. Treat the measured 1k area as normal, 3 passes, overlapping in the middle for even coverage. Now measure how much water is left in the tank. The difference is the amount of carrier needed to treat that area. Use that to figure out how much chemical to put in the tank. Like if you know you're using 1 gal/k, you need 1.5oz of 3-way per gallon in your tank for max rate.
Note that all the #s in the above example are totally made up and just to be used for illustrative purposes. You need to actually go out and do all those steps yourself to be accurate.