Saints defense help

I would like to know if I should run the 46 or Tenn pb with the saints.
I like them both but I'm curious which one yall think would maximize my
lineup which looks like this:

DE-W. Smith
DT-S. Ellis
DT-A. Hargrove/Charles grant in nickel and dime
DE-Charles Grant/Bobby Mccray on 3rd and long, nickel dime, dollar, quarter packages
OLB-Casillas-87 speed and has good coverage skills
MLB-Vilma
OLB-R. Harper-better at OLB than Fujita and Shanle
CB 1-Greer
CB 2-Porter
FS-Sharper
SS-M. Jenkins

Also should I keep fujita and Shanle at OLB, and put Harper at SS?
Harper and Casillas are faster (81 and 87), but Shanle and Fujita are
stronger, more aware and have better play recognition?

I'd reconmend that you use the ten playbook because of you skill on the d-line and solid lbs. That'll make that 4-4 work nice. You need speed and elite DBs to run the 46.