3cl (6 parts) white rum
1.5cl (3 parts) orange curaçao
1.5cl (3 parts) Orgeat syrup
.5cl (1 part) rock candy syrup
1cl (2 parts) fresh lime juice
3cl (6 parts) dark rum

From memory, my Mai Tai's are as follows, and uses ingredients readily available in Aus;

(Approx - and in this order)
Tall Glass / HiBall
Half Glass of Ice
Decent Shots of White Rum, like Bacardi, over the ice
Dash of Orange Curacao
Over half a glass of Orange Juice, or Pineapple Juice, or Combo of the two
A dash of Red Grenadier poured lightly into glass, and it sinks to the bottom
Brown Rum, poured onto a dessert spoon on the surface, so the brown rum floats. Captain Morgan's is good.

Dressed up with whatever you like.
Note: go easy on the Red Grenadier, and Orange Curacao.

You really need to stir it to drink it though !!

Note: VLS - Vodka Lime & Soda is easier on the body. Reducing the sugars in the drinks, will help you out the following day !!

I wonder if orgeant syrup is similar to Orange Curacao, and if Rock Candy Syrup is pretty much Red Grenadier ???

I'm not too sure: but all the recipes that I found on the google machine look quite different. The nice ones that I had were not in a tall glass. The common ingredient seems to be light and dark rum.

en.wikibooks.org/wiki/Bartending/Cocktails/Mai_Tai

Ah Mai Tai's. I worked in a bar in New York when I was younger with the King of cocktails, Dale Degroff (he invented Cosmo's and other popular lady drinks). well Dale had the original recipe card from Trader Vic's, the bar where the Mai Tai was first made. Below is spot on as the original recipe.
Orgeat Syrup -
Sliced almonds boiled into a milky broth then cooled and strained. You then saturate the mix with suger to turn it into a syrup and add a couple of drops of orange blossom water. Its a lost syrup that few bars do these days. I make sure that my bar stocks it at all times.
Rock Candy Syrup
This is an over saturated sugar syrup. you put this one in the fridge and it will just about harden!

3cl (6 parts) white rum
1.5cl (3 parts) orange curaçao
1.5cl (3 parts) Orgeat syrup
.5cl (1 part) rock candy syrup
1cl (2 parts) fresh lime juice
3cl (6 parts) dark rum

I wonder if orgeant syrup is similar to Orange Curacao, and if Rock Candy Syrup is pretty much Red Grenadier ??? no and no. Granadine is made from pomegranates and orange curacao is made from the skins of bitter oranges. this differs from triple sec which is made from the skins of sweet oranges.

Yes, I pretty much said go easy on those sweet additives. Load it up with ice too. It is a sweet drink. You can probably easily add 1/3 pineapple, 1/3 orange, 1/3 water or soda or mineral water....

And if you make the "layered" version, and stick the straw in the bottom, you will be sucking on syrup !!