First of all emnity is the responsibility of the entire party in FFXIV. If you have players coming from other games they are probably not used to this and assume it's always bad tanking. This attitude stats to shift in later levels.

Ask trigger happy dps and healers to let you get a hit in before they go all out. Healers who start curing as soon as you lose 100 HP will get emnity no matter what you do. Make sure you move so all the mobs are in front of you. Getting hit from behind or the sides will greatly increase the damage you take and cause healer aggro. Keep your wrath stacks up to help the healer heal you. Mark targets and ask dps to stay on your target. Ask a mage in your party (white or black) to sleep mobs. Watch the party HP to see if anyone is getting hit.

I see you are level 40 now. Click off regen before you pull. A new white mage will not know regen at your pull will aggro every mob to them no matter what. Ask them not to cast it until after you pull.