This idea doesn't seem to make sense to me. Let me work through it bit by bit and see if I can follow the logic of it.
First, you are a druid/Shifter. You want to die and use
reincarnate to get some better stats. Do you have another druid in the party? You're going to need somebody else to cast
reincarnate for you.
Now say you do get reincarnated. You're hoping that you get a good animal, I suppose. There are some animals which receive no con bonus, and some which have a con penalty instead, but let's assume you are lucky enough to roll what you want. Say, a brown bear (Con +8). On the surface, this would seem great, except that from the SRD (highlighting mine):
A character reincarnated recalls the majority of his former life and form. He retains his Intelligence, Wisdom, and Charisma scores, as well as any class abilities or skills he formerly possessed. His class, base attack bonus, base save bonuses, and hit points are unchanged.
So while your con does go up, you gain no hit points from it at first. Certainly as you level up, I'd allow that con bonus to provide bonus hit points, but you aren't going to get any of that con bonus to levels you already have, because the spell specifically says that hit points are unchanged. You
do still get a better fortitude save though.
Or do you? Remember that when you
Wildshape you take the physical scores of the creature you've changed into. So your own strength, dexterity, and constitution are hardly ever going to come into play. Unless you like the brown bear enough to fight in it regularly, you'll never see a change in your saves at all, because those saves are always dependent on your current form. And if you
did like the brown bear so much, why not just
wildshape into it in the first place, instead of going through the convoluted effort of getting
reincarnated?
Veldrane said:
The stat increase would help me with my HP, that is all I need, cause I get the stats of the creature I WildShape in.
[*] As a Shifter, all the Magical Items reamains functional while I'm in WildShape form
Are you talking about the HP you'll get from later levels? It's a pretty big risk doing this for such a small future gain. I'd probably recommend getting an Amulet of Health instead. Remember the possibility of changing into something that actually lowers your con score!
Also, you mention magical items remaining functional while you're in wildshape. I don't have MoTW with me, so I can't verify this. Do all magic items remain functional even while melded into your new form, or merely when you've taken a form that uses equipment and the item doesn't meld with you? I didn't think they did, otherwise the new magic item, the Wilding Clasp would be pretty useless...