Rammus must leverage his high gank threat and taunt lockdown to punish Taliyah's moderate early pressure and medium invade resistance.
Focus on cross-map ganks and pathing toward overextended AD-heavy lanes since Rammus's clear speed is low and he struggles in direct fights with magic damage duelists like Taliyah.
Jungle Plan
Prioritize pathing that enables early cross-map ganks on pushed lanes to exploit Rammus's high gank threat and taunt engage.
Contest first Scuttle only if nearby lanes can move first and provide support to avoid Taliyah's strong zone control.
Use defensive wards to track Taliyah's efficient clear and avoid extended duels; focus on counter-ganking her roams and punishing when her (W) and (E) are down.
Danger windows
Beware of Taliyah's early level 3 power spike when she can punish predictable movement with (W) and (E); avoid invading without vision.
Avoid isolated river fights before Rammus builds armor, as Taliyah's magic damage and zone control can punish low-health clears.
Be cautious contesting dragon early if Taliyah has pushed mid and her ultimate is up, as she can create numbers advantages and zone effectively.
Early game
Start with a three- or four-camp clear targeting lanes that push or overextend to maximize gank impact before Taliyah can establish river control.
Avoid early river fights unless nearby lanes have priority, as Taliyah's high clear speed and objective control can outpace Rammus.
Secure Scuttle only when your lanes have priority to reduce risk of counter-invade or losing smite fights to Taliyah.
Power spikes
Rammus's taunt (E) and rolling engage (Q) create strong gank windows pre-6; use these to punish Taliyah before she completes her first mage item.
Respect Taliyah's level 6 (R) for map plays; avoid forcing fights when her ultimate is available to prevent being cut off or collapsed on.
After Taliyah completes her first mage item, expect stronger poke and zone control; prioritize ganks on side lanes to offset her mid pressure.
Win conditions
Convert gank pressure into objective control by securing dragons and Rift Herald when lanes have priority and Taliyah is forced to respond.
Deny Taliyah free farm by invading camps early with lane priority and punishing her if she overextends or uses (W) and (E) defensively.
Use Rammus's scaling armor and taunt lockdown to lock down AD carries in teamfights, leveraging anti-AD scaling to carry late game against Taliyah's magic damage focus.
Tip: For Rammus vs Taliyah, read overview, trading pattern, and danger windows first for a fast Jungle lane check.