Keep a low profile, we are currently planning on keeping her in the field and don’t want to burn any bridges.
Have her hunt for Powers in a Can, or at least do as much research on the subject as possible.
Supply her with the parasite binding, which would allow her to capture just about anyone in the city she knows is worth targeting. It would also drive the person in question to seek out Gil and have sex with him more or less the moment he steps through the portal, and see doing so as the most natural thing in the world.
Supply her with Bottled Consent, which would allow her to persuade almost anyone to do almost anything if she can get in close to them. Will only work once, but once is enough if you’re smart and Rose is smart.
Supply her with I am a Dragon, you are now Asian, which would allow her to infiltrate any organization without much trouble. No one would question the former Ward wanting to join up, though the PRT takes a dim view of such things unless she clears it as some kind of sting operation. (They aren’t wild about those either, mind you)
Have her try to capture Vista ASAP, even if that means using company assets. While it’s a waste of a “snipe,” she’s an easy ally and some biological power armor will really pump up her effectiveness in close quarters. Note: she could also get the Mantle after a successful seduction for a similar power boost.
Try to broker a deal with Flechette’s friend and canonical eventual significant other, Parian. She’s an Indy super currently protecting a few blocks of territory from the many gangs of Brockton Bay.
Try to make a soul pact with Parian, which is a bit of a big ask but might work.
Use the parasite to capture Parian, which would be a bit of a power boost, and doesn’t require her consent.
Capture or curry favor with Miss Militia- The current leader of the primary superhero team in Brockton Bay is that incredibly rare thing in this setting: a genuinely good, intelligent, and mature person who doesn’t compromise her morals lightly. She’s patriotic, too. Power wise, she doesn’t need to sleep, has an extremely good memory, and can conjure almost any conventional weapon that could be carried and operated by a single person, with infinite ammo, for her own use only.
Capture or contact New Wave- a privately owned superhero team with publicly available names and addresses; basically everyone in new wave right now is a conventionally attractive blonde flying powerhouse. They are also all currently reeling from the deaths (or near deaths) of all their male team mates.
Capture or contact Purity- The leader of the Pure, the nicer of the two factions of skinheads in the city. She genuinely wants to make the world a better place and is willing to cooperate with non-whites to get there, but she’s still really racist despite herself and very tolerant of others that are moreso. Can fly and fire off energy blasts that can shatter concrete. Probably the most powerful/influential supervillainess in the city based on what the PRT know at the moment.
Capture or contact Fenja- The second in command of the Chosen, the unapologetically psychopathic white supremacists. She’s bloodthirsty, aggressive, and not particularly intelligent, but she’s also a total babe with the body of a pinup girl and the ability to turn into a kaiju sized Valkyrie. If Gil could control her, she’d be an extremely dangerous person with Parasite armor. Top option to use as raw material, since her body is bangin and her powers are great, but she’s personally awful enough that we can do what we like with minimal shame.
Capture or contact Squealer- The second in command of The Merchants, a hot yet trashy blonde, and the leader’s girlfriend. She could coup him pretty easily if we can convince her to do so, or take over if Skidmark dies somehow. She’s a tinker specialized in (essentially) monster trucks, and could make some scary shit given time and materials.
Capture or contact Skidmark- the actual leader of the Merchants. He’s already in charge, so it would be a much cleaner transition, but he’s not a busty blonde chick so idk man.
Capture or contact (good luck) Coil- No one really knows what the fuck Coil is up to. It’s somewhat unlikely that he will be caught by the parasite quickly, but he’s a very dangerous guy and we don’t know where he is.
Capture or make inroads with Director Piggot- “Piggy” is the lady who is directly in charge of the PRT, The Wards, and the Protectorate team in the area. She is a vicious, spiteful woman who will do anything for what she perceives to be the good of humanity. She has declined super-derived treatments that would heal her many health conditions, but the parasite would not ASK before applying body tune up.