i played a arcane duelist bard during king maker (level 1~18ish) found it be my favorite class. i was melee based and with the low spell levels i find that i cant really recommend any debuff spells but spells i did use a lot were...
level 0
basic ones like detect magic and read magic. a light spell (light or dancing light) and mage hand
level 1
saving finale
timely inspiration
feather fall
level 2
glitter dust
gallant inspiration
invisibility
level 3
good hope
haste
see invisibility
jesters jaunt
level 4
dimension door
invisibility greater
freedom of movement
level 5
dispel magic greater
bard's escape
deafening song bolt (use with rod of maximize if you ever get one)
level 6
euphoric tranquility(won the game)
getaway
and yeah i realized you only asked for level 1 spells but by the time i realized this i already wrote the level 3 ones down and i figured i might as well finish :P