Well I'm not gonna say that you should upgrade your equipment. This is what diablo is about, so lets try to make some progress with your current gear.
First of all, reroll that slot on your andariel into %lighting. Ring of Royal is quite not worth it with only Aughilds. You need 2 sets to make it worth. You deal 15% more damage to elites but you could have Str/vit/Cc/CDM on your ring instead of this.
Heaven's Fury is ok, but the Split Fury rune is not as good as Blessed Ground. Split Fury never collides on one target and Blessed Ground grands you extra dot damage for Charged Up to proc (the provoke rune).
You got FoH to deal great amount of AoE damage, try changing Slash into Justice with Hammer of Pursuit or Burst. This will make you deal more single target damage (significantly more). Also change the Condemn into Akarath. I know it's long cooldown but Akkarath with Rally rune will let you deal with 2-3 packs of elites at once within 10-20seconds. Remember that you can DIE on akarath once and you will get 100% hp back. This is out of jail card.
Vigilant is bad passive. It gives you 5% damage reduction and only 2000hp regen. Change it into Divine Fortress for 24% more armor. You can try finery instead of righteousness.
Remember that game counts HP as basic toughness multiplier, that's why sometimes toughness does not reflect the true survivability. You need about 400k HP to be ok. You should have around 20,000 armor with the Divine Fortress - and that is more than ok for T2
Cheers man, its given me a good idea about improvements and looking forward to implementing your suggestions