i used to use be curly, and i liked it, but the protein and cones did build up for me in the long run.
i think you'll really like sif though! i'd do arc angell
on wet hair and then scrunch the cast with sif. you can play around though and see what works for you. it's been a while since i've used deva products - i'm sure some others will come along with advice.
you can do a search, too. there were a few good threads on sif and how people were using it a while back.