That is one powerfull little array... keeping it "kiss" is most important. usually the more you tinker with it, the more you break.
HPs ordering system is a bit ugly, so sometimes drives are broken up over multiple ordering lines. i've seen that before. I assume you "just" have 20 2TB drives.
On the host side: just present each node via 1 path to the host. 4 paths would not make much sense with a 2-node array. (assuming 8gbit host ports)
i'd start simple. configure 3 cpgs for each of the tiers, delete the default ones you do not need.
reserve space to use AFC, but don't enable it just yet.
configure and enable AO
Migrate all data to the AO-FC tier, and let AO settle in. once AO is settled and all the hot data is on SSD, enable AFC.
Thing is, if you enable AFC from the start, it will offload a lot of IO, which prevents AO from moving it up to the proper tier. by first letting AO do its job you put the hot IO where it belongs, keeping AFC free for more IOs from the lower tiers.
for the rest, read up on:
http://h20195.www2.hp.com/V2/GetDocumen ... c=us&lc=enif you want to deviate from the best practices advices described in the document above, please post back here first. So we can understand why, and advice if that is a smart thing to do or not.