at first, yes, now no. Reason: very hard to use 3* to enhance 6* character. prob only 10% and it's very expensive to fail. Unless I'm feeling rich and lucky.
how i deal with 3* previously is this, but I stop doing so liao, because i don't have so many swords and gold and fodders to do so: Train them to lvl30, enhance +5 them, combine to PRAY VERY HARD to get a good 4*. if good, keep. no good, feed 6*. in the end I got 2 lulu, 2 li, 2 aria. (the rest become fodders)
sound good? maybe. but I already have 5* lulu, 6* li and 6* aria. so i thought maybe can limit break. but to evolve them needs fairies...
so i went on to train one of each character and combine them to 5*, since no point having so many li, lulu and aria. Now going to combine the 2 5* that I manage to get from all these combinations.
Doing so much for all these. The training needs swords, the enhance needs gold, fodders and luck.
I also use that guide!