Sion has a deceptively powerful laning phase for a tank. Be careful for his
poke. If you're a melee champion, try dodging it from left to right instead of just walking straight backwards.
Sions shield, although not huge in lane, can really help him with short trades. If you can bait it out before an all in, it can really help grind him down.
Sion can't do much when he blows his cooldowns, if you're a champion who likes extended trades, going for all ins against Sion is your best chance to take control of the lane.
Sion can engage with his
from really far away. Having vision behind the enemy as they push is a great way of knowing if Sion is looking to engage.
Sion is very immobile while his
is on cooldown and he will struggle to stick to the enemy. Use this to your advantage by kiting him at all costs.
doesn't put it on its full cooldown like other abilities. He can cast it again shortly after disruption so maintain your distance after the initial interruption.
Sion has a really strong level 3. His full combo can leave you limping back to your Tower where he can harass from a distance. Less lane dominant champions should give him some space while you try and farm up.
When Sion hits 6, be careful of long range engages. Keep track of him on the map, as he can recall and use his
to impact another lane. Ping once he goes missing.
When Sion gets Righteous Glory, his engage become scarier. Use your escapes after the Glory slow procs, and if you're a prime target, make sure you are positioned behind your front line.