or course it just my opinion,,,but...
i think ur headaches must mostly stem from either your soil (ur using the best so its not that)
or the clones u started with
next time treat ur clones right away and then once a week during the veg cycle with einstein oil(best neem around)
that oil keeps almost all pests at bay and all fungus at bay if u dont let it get too far along
then hopefully by bloom u should have healthy plants without any issues to deal with
just mix alittle bit of dish soap with the neem and make sure to heat the neem oil container up a bit first in the microwave or with hot water