Jimjam asking the important questions. OP, if you're not planning to join a high-end raid guild and earn a bunch of really high-end gear, Wisdom is a less ideal choice, because Stamina is far more important for Shaman.
There are long posts explaining this further but in short, hit points keep us alive AND let us cast spells: mana just lets us cast spells. And personally, I can't think of any encounter where you fail by running out of mana
because your starting mana total wasn't high enough ... certainly none that don't involve high-end raiding (ie. you might fail in a group or long solo fight because you didn't regenerate mana fast enough, but that's different from not having high enough max mana).
So Stamina rocks ... but you won't max stamina unless you have tons of high-end gear. I played Loramin on Blue for at least half a decade. He doesn't have "high-end gear", but
his gear doesn't suck either: a full suit of TOV armor (except for a Vindi BP upgrade), Lodi Shield, +6 neck, Shawl, the Chardok ring, etc. I still have a few more things to acquire (eg. Spirit Wracked Cord), but largely Loramin has "best in slot" gear, for a non-raider or casual guild raider ...
...
and Loramin has 175 stamina. That's 225 self-buffed, which is still more than 25 away from the cap. Also, I think I put most/all of my starting points into Stamina.
If you're not planning to join the Riot/Aftermath/Kingdom/Seal Team/whatever top-end guild, and do a ton of raiding, you'll be better off putting the points into Stamina. But if you do (and we're talking spending tens of thousands of DKP on gear here) then, as others have noted, Wisdom will be the harder stat to max than Stamina.