That setup is needed to read one RTD. You do not loose anything by using a 3-wire RTD as the TMP1200 is not really supporting the 4-wire ones to their full potential. Note that you need to tell Artisan in the Phidgets tab which probe type you connected (as is with the TCs).
You cannot put TCs directly into the VINT hub. You need to add a VINT TC meter like the 4-channel TMP1101 or the 1-channel isolated TMP1100. The VINT HUB0000 can be connected to up 6 VINT devices.
Regarding the Artisan setup with the TMP1200. As this is only a one channel device which you might configure as main device in Artisan using its meter popup, you would need to add the TMP1101 channels (0+1 and 1+2) as extra device channels. If you plan to use on of these as meters, you need to link it via a symbolic formula into the main devices second channel.
Here is my current setup: the TMP1200 as main device feeding the BT, the TMP1101 channel 0+1 as first extra device with a sensor measuring drum temperature and another one measuring air temp from the cooling bin. Some other extra devices. 5th extra device reading ET from TMP1101 channel 2. That ET signal is then mapped via the symbolic formula "Y11" to the ET channel of the main device. Note that those Y variables are assigned in order. First main channel is bound to Y1 (BT) second to Y2 (ET), first extra devices first channel to Y3 (here DRUM),....