Phaser and echo go in the effects loop.

Whammy right in front of the guitar.

If no effects loop, place the phaser and echo before the fuzz.
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It's a matter of preference, too. Try out different combos and see which you like best. I would personally put the whammy, fuzz, phaser, echo, but I don't have an effects loop
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^ thats the way i would do it as well. if you have an effects loop, echo goes there. phaser can go either way. i like mine in the loop, but i know of people who think it sounds much better out front.