all i use is toba's glace too
. i use it for my outline, flood, and decorations. i stiffen it for the outline and use a number 2 tip. when i flood, i use squeeze bottles.
for most of my cookies i don't like the outline to show, so i outline three cookies and then go back to cookie number one and flood...this gives the outline just enough time to set but not enough time to really dry so the flood merges seamlessly with it.
i also use my paddle on the slowest speed for 5 minutes after icing is ready to take out the air bubbles. but i still keep a toothpick handy to pop any that show up