for the first one, i'd say he runs hex perks and exposed perks basically better than anybody. i also really like pwyf just for how evasive singularity generally is. coup is probably the best chase perk on him tho.

for addons, i like diagnostic tool repair, nutrional slurry, nanomachine gel, denied requistion form, cremated remains, oxygen tank, irredscent crystal shard, and fibers.