You don't need to be fast i found a lot of tricks to get the trigger faster for example
If you wanna preserve trigger all you do is type in a few letters to specify the trigger then a blue high lighter with go over the trigger. Then all you do is "(" and it will automatically finnish spelling the trigger out for you

same thing with all the other stuff. If you want the create a unit. Zergling for example, all you do is type in Ze so you specify the unit then you do "," and it does it for you.
Or you can just double click the trigger

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Thats not really a trick its the whole purpose of the system.