Well this has been requested ages ago and I just took the strength to finish it off for his sake. And since I'm on a blogging-streak why not?
Okay so this build I actually got from a Celestial, but the main point is that you guys can see one of the alternative builds in game. ^^

So here we go. We can start off with the skills from the each branch.
You don't need a lot of other skills other than from the Elemental tree.
The Summon tree you would only need the summons you will need. Nature take all if you want to, it's not really necessary.
And for the last Sephira skills, if you really want to focus on your mortal, get it Spectral force.
Otherwise it's a total waste of money. You can learn Resurrection and Concentration.
They are kind of cheap anyways.^^
Lets go to the build then!
This is kind of a mortal build almost. I would say:

Str: 0
Dex: 0
Int: The rest of the stat
Con: 800-900
But this is only what I think though. Add some STR if you are using another weapon other than an [E] Grade.
If you're only focusing on an mortal I'd suggest an [E] weapon to save you stat points.
If you are wearing a [D] Grade armor or Noob Armor I'd say add around 1000 Con or a little more. Also depends on your accessories. But for me, you lose a lot of HP and defence by using [D] Grade sets.
Okay, moving on to the skill bars! ^^
I actually set up the skillbar on this BM Elemental. I'll explain how i thought and why I put the skills where they are.
Hunting skillbar: I put the Tigers where I usually put them ( if you've seen my BM Summoner build you'll understand^^). And followed up by long ranged skills.
I usually put on soul every now and then when I'm hunting, so it's very handy to have it near the left end. Then comes the buffs. Mana Burn, I don't really use a lot but incase of PK it's in reach.
PK skillbar: This bar, I've but the most important DeBuffs at close reach. Summon IF I want to, otherwise I can choose to ignore it and just hit.
After Mana Burn, it automatically goes to the last skill, as you can see I don't even use the Salamander skill, that's because most people have resistance on it and that it doesn't take as much as damage as the other skills.
I know the Anger of Gnome is low ranged in PK but it has the highest damage.
This Celestial has a Maximum of 33 000 HP, 25 000 MAP and 5 500 Defense when it's fully buffed. I'm not really allowed to mention the stats of armor but the weapons are: Hoplon +11 and Rune staff 36 +11.
Hope it helped!^^ And if you have any questions just ask!