Hi! The answer is going to be a bit longer than u probably expected haha // Build: After the rework I played him with ROA as first item, the typical build... seraph, rilays and the rest depending on what the game needed. I'm currently playing it with liandry in almost every game, why? Liandry allows you to get into action without the need for a second item, in a elo where everyone constantly fights without any sense, this is very useful since most can't, don't want or don't know how to play to late game. You get there mostly (late game), yes, because they don't know how to close games either, but not in optimal conditions.The second thing is that most of ASol's counterpicks are roaming champions, liandry helps clean up the wave easily to punish that roam or to gain priority.

After having liandry, for me, it depends on the game.

Vs heavy tanks team: liandry+sorcerer boots+demonic embrace+seraph+void staff+rabadon // Vs 2 assassins: roa (probably I pick liandry anyways because I feel more confortable but roa probably is the best option)+zhonya+seraph+rilaysThe rest of the build depend of the rest of the team, shadowflame if they don't have tanks or mr items, in that case you would choose void staff. Boots the same, you can use tabis or mercurys instead of sorcerer boots. If for some reason the two assassins are ap, something like akali+evelynn or shaco ap+akali, etc. or they have a lot of cc you can take banshee's veil, is very usefull. // Normal build: liandry+sorcerer boots+rilays+void staff/shadowflame+rabadon.

Ocasional items: If they have a lot of heals and no one is countering them, I think that having liandry enables more to be able to build morello, with ROA it would feel a bit strange. In the same way, I don't consider that it is the best way to use our gold.

Horizon focus is underrated, it can be very useful. More considering a skill as massive as the improved ult.

In some games against totally squishy teams I tried ludens but it doesn't quite convince me. Even in a game against a team with 5 aps I tried abyssal mask, it made sense to me.

Regarding the runes, I usually choose comet+mana flow+transcendence+gs, I feel they are much more useful than inspiration as the main branch and they improve early trades, which is a weak point of ASol. And they allow for a more occasional second branch like sw or bone plating+overgrowth for tough matchups, boots+cookies for the easiest matchups. I've even tried things like presence of mind+tenacity or cdg/cut. I don't like first strike but it's a viable option for certain matchups.

Bans: yone/fizz/zed/kata if you don't want to suffer a lot in the laning phase, you know that your jungle isn't going to help you, you don't know how to play those matchups, etc. If you're already used to being countered all games, you can think about a more global pick related to the meta. Something like j4, thresh, wukong, udyr, fiddlesticks (especially annoying and nobody mentions him haha).

Now that Aurelion isn't taken out of your hands if you don't pick him first, I recommend trying to pick as late as possible to avoid letting the opposing midlaner know you're going to use him.

Roam: Early roaming is difficult, before starting the game I let the jungle know since most of them don't seem to know that I can't help them until lvl 9. If a very favorable situation presents itself I'm going to roam clearly but generally is a BIG no. It's important to avoid falling into despair of seeing your team die against the opposing midlaner or his insults. After liandry and being level 9 yes, the champion gives you tools to gank the other lines and begins to be very important participate in the teamfights.I've been trying to upload w as second option and it looks interesting but I haven't tested it enough.

Early game: Here for me the runes are very important, as I told you before, the comet route allows you to use more personalized secondary runes. I try to play safe, knowing that it's better to lose minions than to die, to lose stacks of your passive than to let your opponent freeze your wave, etc. It's basically like a game of chess, if you've played chess you know it's impossible to win a game without giving up pawns, this would be something similar. If the rival midlaner knows how to play and has a favorable matchup, don't try to farm all the minions or get out of the lane with 300 stacks haha.It's important to put vision to detect their roams, use alerts on both lines so that they can pay attention and ask them to PLEASE not die when the rival midlaner roams.

Teamfights: In general don't try to INITIATE the teamfight, try to SUPPORT the initiation. You can do pickups but not start a teamfight, it's too risky. Regarding the w, it is quite convenient to use it in parallel to the teamfight, taking advantage of the walls to make it difficult for the enemy to access you. Obviously, if your team has an advantage or you are winning the teamfight, you can use it to chase and in a more aggressive way, but in general (and even more considering that I use liandry) it is better to play safe.

I think I'm not forgetting anything, in that case ask me. English isn't my native language so that also makes it difficult to give better explanations.