It totally depends on yourself. I'd personally farm 1-3 or 2-1 + bonus stages until i had a fully evolved team and then push on to 12-3 and do that for eternities to come. Going to 11th area without a well evolved team is only going to stop your progress as you get more exp from doing lower level gardens. However, once your girls are evolved the gold costs will be too heavy to offset the better exp so you want to farm lvl 100 manyus to level those that have gotten to evolved 30-40.
And i have heard nothing of the 11th chapter dropping manyus 0.o