Melee status based build.
Suggested weapon: [Plague Keewar] + Exodia Force ([Condition Overload] + status mods)
Preferencial status: Fire, Radiation, Gas, Eletric do not let corrosive or toxic as a final status
Way to go: hold spores, active Toxic Lash, because of the Keewar multiple status types + Toxic and Corrosive damage from your kills you will have 7 different types of status that can stack on your target, letting you kill easily stronger targets.
[Adaptation] and full Umbra set to improve your defense and survivability.
I advise to use a pet (Kubrow or Kavat) with [Hunter Recovery], [Pack Leader], Linked Health and Linked Armor. Your pet will hit and heals you, and you will constantly heal your pet, making easy to go 100+ missions.
Bonus: Your buffs amplify your Ranged weapons damage too, so you will have a lot of damage to deal with some flying Bosses, like Vey [Hek].
If you want even more imortality, change the arcanes for [Guardian] and Grace.
I hope you like it. See you