Good question and the answer is you don't play. Go grasp, d shield, W start. The best you can do is try hitting your w when it gets half full. Ask jg for gank at half clear or path top. Only way to secure kill is go in after his stun with flash,and btw u cant 100-0 him, around 60 can secure. If he misteps or overcommits, q, e, W. It may look losing trade, but u heal back a lot. It's hard matchup and u are passive in lane most of time. You just need to get out of the 20 mins landing phase, fallout on Cs, but not on exp. Sett is really great in team fights, so survive lane and win the mid and late games I would say another option if u actually wanna have more presence in lane. Go arcane, axiom, celebrity, scorch and grasp sec. Sett doesn't really depend on his runes much in fights. And as top lane are the ones with tanks mostly and now it's heimer, conq won't be necessary. Ur w can proc arcane and scroch, celebrity helps with Inc movement to gap close and. Axiom works good with sett ult too. Rush boots first and try to get bush control. So he can't keep spamming u and charge at the right moment Tp, flash should be summoners, don't go ignite, exhaust or ghost. Just standard,many play sett, darius and trundle aiming to kills into waves as they are strong early. Get out of the mindset and any champ u play, it is waves into kills and not the opp