Fiery Wrath Fiery Wrath gives you 7% increased damage against Burning targets, people tend to activate Virtue of Justice Virtue of Justice before the burst so it will apply a longer Burning to your enemy on the first hit - but you will lose damage-over-time by the lack of it's passive effect.
Before switching to Greatsword you can use Shield of Wrath Shield of Wrath , if the blocks don't expire before its duration runs out, it will explode in an AoE that can deal ~5k dmg - but this means you gave up a skill on a 36 sec cd that can be used to block while you are stunned.
Optional: If you are within range and still on Scepter/Focus, you can immobilize your target with Chains of Light Chains of Light so they can't dodge your incoming burst (but they will notice you and the power of surprise is gone plus they might quickly get rid of your Aegis by just 1 hit before you teleport which results in a 20% damage drop)
After done with the previous steps, you can begin dealing damage: use GS's Whirling Wrath Whirling Wrath + Judge's Intervention Judge's Intervention -> this way you can make a devastating opening from 1,200 range, gain ~5 seconds of Fury (you get it after using a meditation), to increase your damage even further, wait until any condition is applied to you and immediately use Smite Condition Smite Condition which deals increased damage if you have a condition - this attack chain, especially if Shield of Wrath explodes, can be a dps bomb, forcing many enemies to disengage if used in a teamfight especially when they are trying to stomp or res and are balled up - but with this, you've already used up 2 of your Meditations - if you had max hp before/during the attack chain, you wasted 4k healing and a condition removal, not to mention your teleport which was a stunbreaker.
After a chain like this, you blew most of your defensive CDs and will likely need to disengage a bit, Leap of Faith Leap of Faith can help you with this, but chances are, you did a pretty big damage to your enemies, and if they are the ones who must disengage, keep pushing with your GS attacks or stop them with Scepter's Chains of Light Chains of Light from running away.
Always ask for a target in the teamfight you are heading to - you can press T to take the target and then use Judge's Intervention Judge's Intervention - this lets you make shortcuts, for example teleporting up to midpoint on Battle of Khylo from outside of the building - not to mention the entirely unexpected burst.