If pros can run a 5 item build which includes SS and 1 pink you can at least get the SS.

Seriously, after watching a few games, I knotice that some Supports usually have 5 item builds with a SS, boots, and their sixth slot left solely for a Pink Ward. And they seem to be able to manage quite well. Even the non-tanky, more damaging supports like Karma do this. So if they can run this successfully, you at least can include the SS in your build since you most likely will not be leaving that 1 slot open for Pink Wards and instead fill it with another build item.