Okay bare with me guys, I know this is controversial, calling out a pro on their play style, but hear me out on this. ZLO's method is to build just enough energy to get by. On small maps, this may give him a few advantages, but on large maps with lots of reclaim it is detrimental to his game (in my opinion). On large maps with lots of reclaim I put four to five engineers on spamming infinite T1 pgens until I acquire the technology for level two pgens and then recycle the level one pgens. I don't see how building just the right amount of power is beneficial on large maps with a lot of reclaim at all, it is simply not worth the micro time and you can find yourself in situations where you need a lot of energy quickly and if you don't have it you fall behind.
In some ways, on small maps I also don't agree with his "energy on demand" policy of building the right amount of energy. On small maps I put one engineer on pgen spam at the right time which sustains me for the game and if I have too much excess energy I pause it and unpause it when I know I am gonna need some more energy or add an engineer or two when I need to increase production. Like if I want to go T2 Com or GunCom or T2 land/air.
I think the method of having a continuous spam going on (whether it is a drip feed with one engy or a mass spam with three to four engys) is better from a macro point of view. In this game you should get in to the habit of always growing your economy before you cut back on stuff. Don't have enough mass due to pgen spam? Look for some reclaim before you cut back on pgen spam (assuming you are pgen spamming for a good reason!). Stalling upgrading that mex? Again, look for some reclaim and/or rebuild mexes before you even think of pausing it or cutting back elsewhere.
By the way, along with TAG_ROCK, ZLO is one of the nicest pros out there and I have a lot of respect for him, but I just wanted to get this off my chest as I have been watching cast after cast and it has been bothering me. Oh yeah and I can do a perfect imitation of the stereotypical Russian accent he has now Just my 2p.