The problem with statements like these is that they can't be generalised. The decision of taking a well, T2, attacking or staying defensive depends on A LOT of factors, one main factor being the matchup. For example if you're playing a known pure fire player you try to keep the powerlevels as low as possible and maybe go T2 early. If you're pure fire yourself you're not doing yourself a favour going T2 early if it's not to finish the game. And even there are exceptions. Different maps, skill levels, playstyles, deckconstellations.....I would try not to go in depth too much on strategies and tactics or the guide will become too long.
If there's a n overall theme of all strategies it might be something about that they all try to get a lead in power (may it be temporary or permanently) and try to defeat their oponent by using their own decks strengths and exploiting the oponents deck weaknesses. If you try to be more specific and situational it gets really complicated and complex really fast. Think of the different approaches nature, frost and shadow/fire take going into a T1 fight alone. There are really good in depth guides about that already and i think your guide is unique so far as it's the only one wich gives an overview about everything from before to after the game.
You could also mention that it's always a good idea to take an aggressive approach. Eventhough passive defensive startegies can work in the low- and midranks you will have to learn how to put pressure on your oponent at some point, no matter the deck you play.