I collected passages from the Anguttara where an ariyasavaka doesn’t seem to fit the conception of at least a sotapanna. While in most passages the ariyasavaka could be at least a stream enterer, isn’t it possible that the ariyasavaka is an umbrella term for any serious instructed practitioner, on whatever level?
“Householder, a noble disciple (ariyasavako) who possesses four qualities is practicing the way proper to the layperson, a way that brings the attainment of fame and leads to heaven. What four? “Here, householder, a noble disciple serves the Saṅgha of bhikkhus with robes; he serves the Saṅgha of bhikkhus with almsfood; he serves the Saṅgha of bhikkhus with lodgings; he serves the Saṅgha of bhikkhus with medicines and provisions for the sick.
“Here, householder, with wealth acquired by energetic striving, amassed by the strength of his arms, earned by the sweat of his brow, righteous wealth righteously gained, the noble disciple makes himself happy and pleased and properly maintains himself in happiness; he makes his parents happy and pleased and properly maintains them in happiness; he makes his wife and children, his slaves, workers, and servants happy and pleased and properly maintains them in happiness.
“Householder, the noble disciple who desires beauty . . . (3) . . . who desires happiness . . . (4) . . . who desires fame ought not to pray for fame or delight in it or [passively] yearn for it. A noble disciple who desires fame should practice the way conducive to fame.
“Bhikkhus, growing in ten ways, a noble disciple grows by a noble growth, and he absorbs the essence and the best of this life. What ten? (1) He grows in fields and land; (2) in wealth and grain; (3) in wives and children; (4) in slaves, workers, and servants; (5) in livestock; (6)–(10) in faith, virtuous behavior, learning, generosity, and wisdom.