Need Help With T7 Horde Survivability

Hey guys, currently running FO/LS with main focus on FO since i don’t have all the benchmarks for pure LS yet. Having trouble with t7 IH’s, getting 1 tapped through full barrier by Aether Fiends and I am not sure what more I can realistically change other than getting Tyrael’s and doing more MW. Max res’s and armor cap obv, shako, concentration on chest, mage lord’s on pants, 20k life, running reinforced over an additional damage glyph, perma barrier uptime — still getting 1 tapped. Any ideas on what I could realistically change?