Any tips or advice?

A question from a fellow grower:

my problem is leaf tacoing on my xj-13 strain. my temp is between 75-80f but my humidity is usually 40% to 59% i have started to turn my 600 watt MH down to 75% on the ballast and that has some effect. they are just moms but i run a nursery and need the max amount of clones every 2 weeks. any tips or advice yo have would be very appreciated.