For starters, this is a perfectly balanced team. 2 tanks, 2 supports, 2 damage. This could be a competitive or a beginner build. As a beginner, it would help, if you don't have that good of aim yet, to have Reinhardt's stun, Ana's sleep, Pharah's concussion, and Soldier's tactical visor. As for competitively, you'll be able to give a high damage output due to Zenyatta's orb of discord. There are several combos to be used as well with this group. For example, a sleep from Ana makes easy work for Soldier to take an enemy down. Another one is Zarya's and Soldier's ult which makes for a quick team kill. One more is if Ana uses a sleep and Reinhardt dashes for a quick kill. Personally, I think Soldier should take priority over Pharah when it comes to Zen's orb of harmony.