When they're in this alignment:
DE/SLB - Taylor
DT/5T - Nkemdiche
NT/1T - Al Woods
DT/3T - Poona Ford
DE/Leo - Dunlap
Mike - Wagner
Will - Brooks
LC - DJ Reed
SS - Adams
FS - Diggs
RC - Flowers

When they go Nickel, I expect this:
DE - Carlos Dunlap
DT - Kerry Hyder
DT - Poona/LJ Collier
DE - Aldon Smith
MB - Wagner
WB - Brooks
LC - DJ Reed
SS - Adams
FS - Diggs
NB - Blair
RC - Flowers
As an additional note: Defensive line starters for this team doesn't mean much. They have a lot good guys, but no real stars that need to command the lion's share of the snaps. I only expect Poona & Dunlap to be somewhat in that category. They go 2 deep at every spot on the D-Line, with little to no drop off potentially outside of Poona.
Al Woods has Mone behind him.
Nkemdiche has Collier & Hyder behind him.
Poona --> Drop off.
Dunlap has Aldon Smith, Benson Mayowa behind him.
Darrell Taylor has Alton Robinson behind him.
They could use another DT, but they have every flavor of DE you can think of. That is 11 D-Lineman I listed with one of them probably moonlighting as a LBer. Teams usually keep 10 D-Lineman on the 53. So I am close to what it'll be.