White widow

would not be trimming anything really maybe a finger of a leaf if its coverin a bud that would be about all

Hi there! You have probably been giving them way too much N, burnt tip and clawing leaves are a good sign to know. Bend the main cola to 90° angle and support it if needed, DON'T pull off leaves cause in your plants case there is absolutely no need for it. Good luck!

I think your top cola is getting light stress, you can tell by the leaves curling down, they are scared of the light. You can try to gently bend and tie the main cola down of you can't raise the light any further.