Hehehe, my dog will still be a better tank
You should probably find a way to get more battlefield control in there, such as taking a glaive and getting ticket of blades and something like stand still (from expanded psionic handbook) to prevent people from moving around, this would grant you the ''tank'' title, instead of just being able to take punishment.
Also, we got our hands on some animated shields in yesterday's session, these will help.
I have to wonder if adamantium full plate is a good idea, anyone can back me up on this?
Post your build, maybe people here can comment on it
(I play in his game, rest of the party is :
Turning cleric.
Summoning druid (me)
Halfling swashbuckler rogue
Elven anima mage wizard)