i think what there saying is, make a variable of the "tag" and create them in a loop and call for the data
then you have all the tags and you know wich one is what:
on "tag1" complete set data1 to lastdata
on "tag2" complete set data2 to lastdata
and maybe this plugin can help you...
link
yes this will work i think, you only need one 'oncomplete' for all the requests