Olaf is pretty versatile in the sense that, in many cases, he can build tank or damage and still do his job (getting to and killing the enemy carries or keeping them out of the fight long enough that your team can beat their team) effectively.

Tanklaf = 9-21-0
Olafgar = 21-9-0

Tanklaf

In match-ups were you are automatically going to get poked to heck and back you can go 9-21-0 and just build tanky to survive the poke while getting the farm that you can. Ragnarok still lets you get to the enemy team's carries unimpeded by pesky crowd control. Reckless Swing still... Read More

I've racked up a number of Sion top and one mid game of late.

I've been running him 21-0-9 and he still feels plenty tanky enough most of the time.

I've been using two rune pages for him depending on my lane opponent.

Vs AD - 9 Hyb Pen, 9 Armor, 9 Magic Pen, 2 MS Quints + 1 Hyb Pen Quint
Vs AP - 9 Hyb Pen, 9 Scaling Health, 9 MR, 2MS Quints + 1 Hyb Pen Quint (grrr...Teemo).

Sion's main form of harrass in lane is Roar of the Slayer. It does silly damage if you manage to smack a minion into the enemy champion, especially given all the magic penetration you are sporting... Read More