Kubel has the same sight range as a pathfinder (50) but needs a lot of attention and micro. (Doctrinal) JLI also have 50 sight range and camo in cover.
As for AA, your only option (other than flak HQ and flak HT) is the doctrinal 20mm flak emplacement. Tbh, the flak HT alone is enough to clear the skies of any real problems and gains vet doing so.
For reaching out, stuka is great but (doctrinal) LeFH has further range and arguably more firepower but spread out over many shots. Think of it like a bigger (fixed) and much meaner LeIG minus smoke.
...the most famous okw micro skill-based unit, the KUBEL....