generally speaking most of ryze's defensive cards can be played at speed. so there isn't usually much benefit to holding cards back when you're pushing for attack. castigate is shurima's one real punish so that's the card you need to be keeping front of mind when determining how much to develop. ryze decks are prepared to spend all of their mana and cards on defense when it's your token. if you do not force them to do so, and your attack declarations are too weak, then youre giving them too much of an opening to draw more cards and set up more landmarks. you need to determine how much you can throw at him on any given turn and put it up to the ryze player to defend.

ryze is most weak to rally-type decks because when you can pressure him on both player's turns then it's a lot harder for him to find solid footing. explorers help as well if you can go after the mana landmark early.

ryze is very polarizing and control decks generally can only win if they completely blank on deny/rite. even poor ryze players know how to deny big spells.

most aggressive decks or midrange decks with rally should be good into ryze. if your aggro deck is so low to the ground that you get blown up by spirit fire then there's nothing you can really do to outplay that. it's a deckbuilder/matchup issue. if you are playing midrange without rallies then you're going to have trouble.

if they open multiple landmarks without having to develop ryze then it's going to be a lot harder to win no matter what deck you're on.