I've seen lots of exos in the tower with serving jobs like being a post person, cleaning, or being a guide.
I feel like this is the proper role for all exos as I don't think they are very adept in combat.
Whenever I see exos in the crucible I feel like I should destroy their ghost as well so I can dismantle the exo and use their parts to upgrade my weapons.
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Remember this. The people you're trying to step on, we're everyone you depend on. We're the people who do your laundry and cook your food and serve your dinner. We make your bed. We guard you while you're asleep. We drive the ambulances. We direct your call. We are cooks and taxi drivers and we know everything about you. We process your insurance claims and credit card charges. We control every part of your life. -Fight Club Don't -blam!- with us. ;)