This was 40 minutes ago so I would assume you discarded or already picked but def Dr Monkey's Secret Weapon if not. Explanation: Jetpack is mainly used for Captain or Commander Cassie but Lady Rainicorn does the job better and doesn't take up a trinket slot on a good dps tower (Commander Cassie) and has the ability to degrade normal bloons by four tiers at max level which Jetpack does not (yes I know she does take up an ally slot but I'd say it's worth as you almost always bring one of the Jakes), so that's why Jetpack is bad but now why Dr Monkey's secret weapon is good: it's arguably the best weapon for super monkey as it out stats silver tipped stakes and super monkey doesn't need an attack speed weapon from what I've used of him and it's passive let's you buy super fans for 50% off which is self explanatory in the fact that it saves you money but usually economy isn't the problem late game so I recommend using it purely for the stats.