を前提に => On the premise of N1
Premise
させてあげる => (Allow) N4
Allow
手前 => considering; before; in front of; one’s standpoint N1
のが上手 => to be good at doing something N5
のが下手 => to be bad at doing something N5
てあげる => Help, do for N4
Give and take advice
てさしあげる => Do for N4
Give and take advice
てあげてくれ => to do for; to do a favor N3
Coercion
てあげる => to do for; to do a favor N5
てさしあげる => to do something for somebody N4
Respectful, humble
げ => Looks A N2
Adjectival, Descriptions
あげる => ...Up (Upwards) N4
Direction