Just checking in here. Appreciate you stopping by my grow, Dr. Shak. You're well on your way to the same result. Must admit I sort of skimmed through. You did finally decide on just fluoros for flower? Even if you have the 436 watts, one fluoro watt does not produce near as many lumens as one MH or HPS watt. Lumens are what's important. You are growing in a closet that is attached to a room that is air conditioned, right? I have a 400 watt HPS and only need one fan blowing cool air into the bottom of my closet to keep it the right temp. So if heat is your concern, don't worry about it if you have a/c.
Another thing I noticed was the leaves you trimmed off were pretty green still. If you're having problems with discoloration you want to leave them on until they're completely toast. This is the case whether it's burn or deficiency. The plant is either storing excess nute in the leaf or pulling it out to supply deficient growing tips. If you cut it off, the same thing will happen to a different leaf. So leave them on until they're 75% dead/brown. No one has plants where every single leaf is perfect. Sh!t happens.