u/Brokehood404

I have a question about runes that can be taken on tryndamere.
I see Grasp is an rune that it still is on the recommendation tab, why is that? Even on Lolalitycs, i see its a very good rune that holds the highest winrate.
About HoB, It feels straight-foward, take it on squishies to melt them quick.
Lethal tempo, is it for tanks? I really struggle much with tanks as tryndamere, it feels like after a cloth armor item or tabis, i cant fight a tank even if they're already 0/3

Excuse my ignorance on this post, but i really want to learn the usage i could give to different runes on trynd