Hero Picker

Another team composition tool that can help you figure out which heroes work best on which maps. This one is interesting as it provides a "default preset" for common team compositions such as "Deathball" and "Dive" -- even relatively new but highly popular compositions such as "GOATS" are included.

Mercy’s Superhop

This is a very brief guide to Mercy's superhop technique, which was first posted on Reddit by /u/StarSplosion. /u/brokenstyli made this helpful and informative GIF to quickly illustrate the technique.