Strategic summary and impact analysis for patch 7.37c.
Multiple nerfs to core teamfight sustain items (Mekansm, Guardian Greaves, Pipe of Insight, Holy Locket) and utility/control items (Gleipnir, Rod of Atos, Solar Crest). This significantly reduces the overall survivability and utility provided by support and offlane itemizations, making teamfights more lethal and less forgiving.
With less healing and damage absorption available from common items, burst damage and strong initiation become significantly more potent. This shifts the meta towards shorter, more decisive teamfights where quick kills are paramount.