125g stocking help please

[docjones]

I am in the process of stocking my 125g tank and would like to make it mostly triggers. I have the tank very wide open since the rock work is designed as pillars. I have three pillars set up, one that almost reaches the top of the tank, and the other two almost make it 3/4 to the top. So with this wide open atmosphere what are my stocking options. The pillars do have some caves for hiding. I want the following fish in order of desire.

Niger Trigger
Volition Lion Fish
Hum Hum Trigger
Clown Trigger
Blue Lined Trigger
Yellow Tang
Naso Tang

Now I am assuming I cant keep all these fish, but I do want atleast one tang to help algae control. But after that how many more could I hold? thanks.