i noticed that. kill luca was strange but still it finished the bounty 100% of the time so i didnt bother to change. its easy to fix though next time i see it. i think you understand that i cannot watch the bot 10h a day to get that quest

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actually it just got the quest when i finished typing. so it should be fixed now in V13.
basically M6 marauder gear + skills.
vault companion 3 spender +sentry. passives: awareness, tactical advantage, custom engineering + some other damage passive (for example ballistics if you use rockets. or cull of the weak for frost dh )
gear: m6 with ring to get the 6 set bonus. illusory boots instead of the 6th piece. danettas set. 2xunity + follower immunity token (templar for the heals).
dont have a specific neck.choose the best one you got. immunity necks are always nice but i dont use any.
last slot is belt. i recommend harringtons with high priority chests or kreml's buff belt for extra movement speed if you dont need the damage.
~550k hp ~10 million toughness total ~1million damage.
newest QT 2.1.40 + trinity 2.1.21 without any modifications. db beta 485
also this:
set kite range < 7 or just disable it / set it to elites only. otherwise it sometimes kites to far away from quest objectives. set container open range <= 25. (there is one stuck location because of a closed quest door, still sometimes gets stuck there though)
recommendations: Illusory Boots, movement skills, gold inactivity timer enabled (im running with ~300s, a5 maps are pretty big)
sounds like you need more gear for t6 then. my dh mostly dies on boss fights. 2-4 deaths per hour.