For increased range and damage, try casting Shock Blast through the Acceleration Gate.
If you find yourself taking lots of damage, try using Jayce's Hammer Stance, as it grants you additional defenses.
Be sure to switch stances often. It will enhance your attacks and grant you quick bursts of speed.
Rammus often stacks high Armor, leaving him especially vulnerable to caster damage while not in Defensive Ball Curl.
Pay particular attention to when his Defensive Ball Curl is off. Rammus has much lower stats than a normal tank when he's out of the stance.
The stat comparisons shown on this page feature several critical Jayce vs. Rammus matchup stats that may help us understand the differences between the two. Jayce’s KDA ratio ([kills + assists] / deaths) of NaN is better than Rammus’s KDA ratio of NaN, indicating that Jayce may be more central to his team's team fighting potential than Rammus..
Jayce usually has a slightly larger longest kill spree than his opponent does. Typically, he receives less damage than Rammus. This commonly reflects different amounts of tankyness, yet it can also show that the champ with more health has less mobility and thus is not able to flee from further damage when engaged or poked.
Both League champions are great. Both champs have their strengths, weaknesses, and counters. In League's current meta, Jayce usually loses when facing off against Rammus, with a 46.4% win rate. Therefore, Jayce makes a bad counter for Rammus.
While Jayce does have a lower winrate than Rammus, when they face off with one another, Jayce also has a greater difficulty level that makes him a more time consuming champ to pick up and master. You should expect to face a difficult match when picking Jayce into Rammusas his relative depth means you may not be able to reach his full potential without a lot of practice beforehand.
Moreover, Jayce has only a small amount of utility and CC, a similar amount to Rammus. This often makes her just as valuable during teamfights, especially when facing champions with a lot of burst damage.
While there isn't a single best champion for every situation in League of Legends, in Jayce vs Rammus matchups, Rammus is the better champion with a much lower win rate, more champion depth, and a similar amount of utility to help out your allied champions during teamfights.
Jayce is a garbage counter to Rammus. Make sure you focus your tactics on maximizing your gold and cs and destroying objectives. If you do that, you should be able to stand on your own as Jayce against Rammus.
To learn all of the intricacies of Jayce in order to counter Rammus during both the early game and mid / late game phases of League of Legends, you should continue reading to pick up a few extra tips and tricks for this matchup. If you pay attention to the build and stats displayed above, you should increase your win rate by a lot and be that much closer to League of Legends pro players.
Jayce on average picks up much more CS relative to Rammus. Champions who typically don't earn much CS often don't have to have much CS to be valuable teammates, such as supports. They are capable of scaling well off of their skills, stats, and first items alone. Yet, champs with a lot of CS, such as hyper-carries, often require several high cost items to be effective. In either case, try to exceed the numbers shown on this page to do well.
The most important items to have in your Jayce versus Rammus build consist of Youmuu's Ghostblade, Edge of Night, and Serylda's Grudge. When Jayce bought at least these three items in his build, he did a lot better vs Rammus than with many other commonly used counter builds. In fact, Jayce boasted an average winrate of 46.4% when playing against Rammus with this counter build.
To have the best probability of coming out on top against Rammus as Jayce, Jayce players should use the Phase Rush, Manaflow Band, Absolute Focus, Gathering Storm, Biscuit Delivery, and Magical Footwear runes from the Sorcery and Inspiration rune sets. Out of all the rune combinations players picked for Jayce vs Rammus fights, this set of runes yielded the highest win rate. Notably, these runes provided a 46.4% winrate overall.
If you would like to view Jayce x Rammus tips and counter builds for a a specific skill level, please select one from the selection menu provided above. By default, the stats and guides given are calculated using every round run with these champions.