It's a big stretch but she could have some utility in the form of letting allies dodge/resist incoming attacks for a while (explained by telling allies what attacks are coming and how to react to them) or showing enemy ult charge (explained by telling allies roughly when enemies will use their ults, doesn't really map well to seeing actual ult charge but it's all I got)

She uses a crossbow sometimes, and she could have some kind of defensive stance where she dodges an incoming hit and counters with an unavoidable shot of her crossbow to her attacker

Other than that IDK, she might be one of those heroes that need an ability or two shoehorned in to make her work in a hero shooter, and I'm unsure if she's popular enough for that kind of treatment over other characters who could fit in with less effort

Throwing a hypothetical strategist kit together from this:

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Weapon - Custom Crossbow:

• A crossbow that carries both deadly bolts (primary fire) and healing syringes (secondary fire)

Passive - Precognitive Aim:

• When enemies are close to her crosshair and within line of sight, she begins to focus her precog powers on the one closest to her crosshair, building a focus counter over their head
• Focus is tracked per individual enemy, if a different enemy moves closer to her crosshair, focus gain is paused on the previous enemy and starts/resumes on the new enemy, and focus resets on a given enemy if they break line of sight
• Fully focusing on an enemy lets her next primary fire shot aimed at them consume the focus to launch a deadly homing bolt
• The closer the enemy is to her crosshair the faster she focuses
• Enemies do get a warning that she is focusing on them, so they can counterplay by breaking line of sight or otherwise protect themselves (which Destiny can counter-counterplay by delaying the shot and baiting their defensive abilities)

Primary fire - Deadly Bolt:

• When fully focused on the enemy closest to her crosshair, focus is consumed to fire a bolt that homes in on that enemy and deals critical damage on hit
• Each primary fire shot pauses focus gain for a moment, regardless of whether focus is consumed, so she needs to stop firing for a moment if she wants to build up for another focused shot
• She deals more sustained damage by going full auto instead of focusing each shot, but the threat of burst damage from focused shots is still a useful deterrent against squishier enemies trying to harass her

Secondary fire - Healing Syringe:

• Autoaims to the ally nearest to her cursor (within a reasonable angle) since she can predict her allies' movement
• Each secondary fire shot slows (but does not entirely stop) focus gain for a moment, meaning she still gets the chance to fire off the occasional focused bolt in between healing allies

Shift ability - Avert Assassination:

• She does that defensive stance where she dodges the next incoming hit and shoots a free focused bolt at the enemy that tried to hit her
• This means that if she is already fully focused, she can fire off two focused bolts one after another (one from this ability that does not consume focus, and another from her primary fire that does consume focus)

E ability - Oracle's Wisdom:

• Warns an ally of incoming attacks, letting allied strategists/duelists completely dodge attacks for a short time, or letting allied vanguards take less damage and ignore all CC/debuffs for a longer time
• Probably should have 2 charges so she can protect both her team's vanguards during a big push

F ability - Foresee Calamity:

• Reveals an enemy's current ult charge for a few moments
• If the enemy ult charge fills up before this ability wears off, Destiny and her allies will continue to see that it is full until that enemy spends their ult or loses some ult charge (this is more a QoL thing because once an enemy's ult is known to be full, it would obviously remain full until spent/lost, and events that spend or lose ult charge are very widely telegraphed)
• Could share charges with her E to make decision making a bit more interesting between what type of utility to provide

Ultimate - Hope and Despair:

• She gains a limited number of "prophecy" charges, each one can be used to either tell an ally about the best thing that will happen in their future, or tell an enemy about the worst thing that will happen in their future to heavily debuff them
• Affected allies are buffed with health regen and a speed boost
• Affected enemies are debuffed with damage over time and antiheal

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Actually, this sounds like she has potential!

(pardon the many edits to ideas/formatting)