Exactly what you would for an Artemis build.
The Maverick would give you better armour and shields; also more carrying capacity in terms of grenades (pretty sure the Artemis gives you +1 power pack, other than that no benefits), also better shield regeneration, as well as goods/data carrying capacity is better than the Artemis.
Stealth build depends, I'd say Night Vision and Quieter Footsteps are good choices. The rest, well, up to you. I prefer mobility - Sprint and Jump, but really depends on your preferences. Battery is a good stealth option for outside because you can last longer scoping things out without eating into your energy packs.
POST EDIT: Obviously, another stealth advantage is that the arc cutter is a great in-and-out tool - one reason not to use the Artemis is that you've got a hand whisk that has absolutely no use. At least the cutter can come in handy!
Well, Artemis is not just "+1 power pack", it also have best jump capability of all suits. It can fly much more longer than other two combined, and with jump assist mod, given if there is low enough G, you can jump once, and never touch ground unless your power runs out. This makes it much more mobile than other suits. Its not that much weaker in terms of defence at G5 vs Maverick, its almost as same.
This alone makes it quite viable to any stealth/assasination gameplay, and not having arc cutter with it, forces to think a little, if you would wanna open certain doors or lockers. It still have enough room to carry, no need to collect all junk around, whenever its mission junk or most needed items for upgrades/engineers.
I use on Artemis improved sprint, jump assist, extra battery capacity, NV. For me its more use for reasons above, rather than exobiology, but whenever I would decide to explore, that setup it would work just fine.