"...do you use the trigger outputs and for what purpose "

They work great for glissando's of course, but I mainly use this
feature in conjunction with the A155's glide function. It can insert
notes in-between the clock pulses, creating more complex rhythms than
possible with just a step sequencer.

If you're careful, you can make this work using the pitch CV. Much
more control is possible, though, if you use the second A155 track as
a dedicated glide/trigger controller.

Joe