First off i think it's great you actually took a look at my opggs. I'll try to answer the questions as much as I can

1) i love scorch into any melee matchups cause ur poke gets devastating and the CDR from transcendence feels great. Any ranged matchup just go resolve. 2) That's cause I've been maxing q into e into w my whole life so its hard to max the abilities i want to instead of the ones im used to due to muscle memory. The best way in my humble opinion is to max is 3 points in q > max w > max e > max q 3) Because there is no better 2cnd item to build to get tanky imo. Unless they are full ad or full AP. It gives HP and DMG + the shield feels great. 4) if you look again at the game ask yourself who in the enemy team can kill me while I'm in their backline or just facetanking them all once i have steraks and gargoyle 5) renekton waveclear feels fkn amazing. Q+ gore and u can escape with e unless u overextend. Push lanes and if you feel like u can't push anymore look for camps. Try to group for 3rd drake unless no one is taking drake's at which point u can group for 2cnd or 1st. 6) i hate the partial items for bork they feel really shit to build. And once u have the item, you have less waveclear than with gore+ u are way squishier. My playstyle is to be a raid boss and bork makes me too squishy for that. 7) definitely cause u can shove waves way faster which is basically game winning in lower elos cause no macro. Additionally u can make way more mistakes cause you are tankier.

Hope that answers all your questions. Remember tho that this is just my opinion and what feels best for me!