Anathema put the wrong number in title to remind us he is still human, which is difficult to imagine seeing his godlike level on league, truly magnificent.
Ghost by default/when enemies have dodgable damage or a lot of ranged champions so you have to catch up to them, barrier/exhaust when you want burst protection or more dueling power (good against Zeri/Kaisa). imo exhaust is very underestimated as it basically guarantees you will win a fight or at least burn a cleanse, in which case you can re engage with R a couple seconds later
I build AD item (BF Sword/Pickaxe) and complete Runaans before completing IE. Kraken gives no crit so it doesn't scale as well, also it's getting nerfed so imo it'll be kinda dead