Great in depth guide but a few things to point out, one is that shyvana in the top lane is definitely a tower destroyer but the problem with that is her weak early which was pointed out, but the problem is shyvana has 0 CC abilities with the exception of her knockup from her ult(basically nothing only good for engaging teamfights/backline) so she will get bullied very easily in lane so the main focus of shyvana top right now should be to farm as much cs and turret plates as possible while avoiding fights around lvl 11 shyvana can 1v1 almost any top laner if played properly. Another thing to point out while lethal tempo is a great rune for toplane with iceborn gauntlet it almost defeats the purpose of extended fights, so as a second item I would reccomend going for trinity as it gives you the movement speed and the enhanced autos to constantly put out damage. In team fights she is strong as a tank but more importantly she can shred enemies quickly as lethal tempo with a lot of health can be utilized to do a great deal of damage to tanks as her E allows her to do % of enemy max health which is essential to land for a fight. In laning phase never engage if you miss an E as the damage will be extremely underwhelming other than the fact tank lethal isnt the best these are good tips.