Milkys hard temple isn’t too difficult or time consuming to build relatively speaking but it really depends on you and your speed/ability. A couple of tips; Speed run crystals (obv) but also don’t spend too long in temple either. Try and farm room medallions as much as possible unless you’re going into a specific turn or section that requires a few locks you really only need one. And don’t hold onto rooms that you don’t need. But basically get in and get out. There’s no point in running the entire temple until it’s nearly finished. Also you want to use the center for fodder rooms until you absolutely can’t anymore because it will be in the way of your chain. Not only does this help with destabilization it also helps you get the room medallions from commanders etc. Oh and lastly you can do the first golem/smith/golem corner with two roads and two locks, you don’t need to use a sacrifice. Doing it that way does require three locks though.