Newby 2fast2vast auto flower flowering leaves with brown spots

[Newbautogrower420]

So this is my first grow. Strain is 2 fast2vast autoflower by heavyweight seeds. Grow setup is a 2ftx2ftx5ft tent. Exhaust fan, fresh air intake fan, fan for circulation. Lights are 600 watt LED and 2 300 watt CFLs. Led is about 8 inches from top of plant and CFLs are very close on this side of plant. Grown in soil/coco mix in 5 gallon bucket. Water pH to 6.5-6.8. soil pH around the same as water pH. I water until runoff about everyday. About half a gallon to a gallon each time. I use fox farm trio fertilizer. Once or twice a week I give 1 tsp of tiger bloom fertilizer and 1 tsp of big bloom per gallon of water. I stopped the grow big fertilizer a couple weeks ago. She is on a 20/4 light schedule. Started with 18/6 switched to 20/4 when flowering started to try to speed her up. Flowering seems slow to me, seems buds are not as fat as I thought they should be after almost 2.5months also leaves are getting brown spots on them

 

[TysonOG]

The reddish spots/veins indicate a definite phosphorous deficiency to me but there are other deficiencies as well. Could be root issues not allowing for proper uptake.

 

[Newbautogrower420]

Okay well that gives me somewhere to start, thank you for your input and your time.