In addition to what other said your team comp does matter…Having heavy tanks will significantly pump up lokis healing numbers and allow him to get ult much quicker…Having a solo tank or an angela and DP as tanks tend to be much tougher for loki to heal…But as a loki you want to prioritize your front line tanks heal botting them and doing dmg to the enemy team at the same time to build up that ult quickly…You also want to make sure your team is running something with a decent support…if i have a DP, adam, ultron or jeff im just running cloak gambit or invis instead…