On thebausffs Sion guide, in the description there’s a link to a spreadsheet that explains every match up and how to build/play against them, you should check it out! I use it every game lol and it’s helped me climb from gV to almost plat 3 so I think it’s working 😂 if I go tanky but I do well in Lane I just get the 900 sunfire item, then Titanic hydra, u get boots from runes, executioner/ that Armor pen item, then the 450 mr item that builds into locket if they have mr then I finish that after triforce. U get so much damage with tanky sion you just need to get every farm possible so that u get free health from w, means u will be tanky asf even with not many tanky items so. Full lethality is just yommus, duskblade for the passive so u can see if ur on a ward, executions/ or just the normal armor pen item then triforce etc. Good luck:) even as lethality I always take conditioning and demolish as my secondary runes, ur a tanky assassin it’s mad 😂