The only technology right now that can give you low latency while your shared connection is saturated with torrents and memes is something called fq_codel. I was at a small LAN party where we shared a 20/1 connection with 8 people. All gaming, torrenting and watching streams without lag thanks to a fq_codel based router.
You'll need a router where you can install DD-WRT or OpenWRT on, TP Link TL-WDR3600 (cheap, N, not AC) or the Archer C7 for example. Enable QoS, use an ethernet cable.