lurking but I had colic babies.
What worked for me was dark room, white noise (raindrops or something...I had an iphone app), woombie is the only swaddle that worked for us, and rock to sleep.
my DD had bad reflux so she slept on my chest/shoulder, my DS liked to be cradled in my arms in the glider.
If they take a paci put it in their mouth!My kids loved soothie/wubbanub but both gave it up around 4 months old and DS went to sucking his thumb (still does).
I also felt no guilt about nursing to sleep....IMO it was natures gift to make them drowsy/go to sleep at this age and I was going to take advantage of it!