fav training technique

Backbuilding is risky and can certainly make your bud more susceptible to Botrytis cinerea. Use more light or pick a variety known for larger dense bud if that's what you're looking for. If you try backbuilding be sure your humidity and air exchange are perfectly controlled.

Regarding other training methods:
I mainline my plants to open up the canopy and remove all bud below 14" from the plants top. Below 14" I find the bud gets smaller and takes away from developing larger bud up top. Mainlining also makes IPM easier and increases air flow through the plant. It also makes plants easier and faster to trim.

 

I'm prone to mold most of the year and go the opposite and extend my internodes(not overly stretched)
by using the warm white light or hps early during veg

 

Indoor sativa in Hydroponics the buds get so heavy they bend over, Loli pop training technic .
Now I use a 3 tier trellis netting racks.
pics of first trying these racks
Now I am putting the plants in their racks 4th to 5th week of veg