In a large mixing bowl, combine 1-1/2 cups flour, yeast, sugar and salt.
In a saucepan, heat water and oil just to a boil.
Add to dry ingredients; beat on medium speed for 3 minutes.
Stir in enough remaining flour to form soft dough.
Turn onto a floured surface; knead until smooth and elastic, about 8 minutes.
Place in a greased bowl, turning once to grease top.
Cover and let rise in a warm place until doubled, about 1 hour.
Punch dough down; divide in half.
On a floured surface, roll each piece into a 13 inch circle; transfer to two 12 inch pizza pans.
Build up edge slightly.
Prick dough thoroughly with a fork.
Bake crusts at 450 degrees for 10-12 minutes or until lightly browned.
Combine the cream cheese, crab, milk, feta cheese, basil, oregano and garlic powder; spread mixture over each crust.
Sprinkle each with 1/2 cup Swiss cheese.
Bake 10-12 minutes longer or until crust is golden and cheese is melted.
Cut into wedges.