This and following posts may be helpful.
As in the above linked example, your RB750gr3 has been converted to DSA and your TP-Link TL-WA1201 AP's are still using swconfig. You will not be setting up wireless on your RB750gr3 of course - doesn't have it. And you may want to name your vlan's differently, add more, etc., but it is very close to what you want to accomplish.