Yup, it's clear that Leo-sama is recommending weapons based on her opinionated happy memories rather than practicality, which in itself, is adorable.
As mentioned elsewhere, flails are powerful, but challenging and exhausting to use, and actual war-scythes are a fauchard-like polearm, since agricultural scythes are at an oblique angle only good for cutting grass, wheat, or the user's shins. Leo's fantasy scythe is more a poorly-proportioned bladed pick.
As for practical weapons for Fooly, I'd say a quarterstaff, a spear, or a longsword (i.e. bastard sword), as they could all grant a measure of reach and make the most of average or squishy-wizard strength.
tl;dr: We're not here for the realism, we're here for the squee and scars and abs.