Wedding cake x white widow

First time grow

Hello this is my first grow. I was wondering if any one with much more experience would be able to give me a wild guess on how much yield should I expect. I have 4 indica plant week 3 of flower about 50’in tall from the top of the soil. Growing in 10gallon grow bags and been feeding them General hydroponic floral series nutrients. Lights are marshydro 400w, Apollo horticulture 300w, kingplus led 1000w, Aglex 600w. I have ran into some nutrients deficiency during veg like, calcium, and ph like 2 times in its life span . And recently had 2 nights at 55*F. Also snapped one top branch accidentally during week 2 of flower is that bad?