Powertap Power Averaging Display Settings For TT Or Intervals

Those of you who are experienced TTers and use a powertap, which power averaging display settings works best for a TT event or intervals? Currently mine is set to 2 secs but I am wondering if 5 sec would be better? Today on the trainer (severe storms in my area) I was doing intervals and ran up against the aliasing effect which is well documented on this forum. My cadence does not fit nicely in the 1.26 sec recording interval

After I am rid of this wicked cold I want to do a outdoor 20 minute threshold test. I had previous did one one a trainer and I was wondering if pacing is easier with the display set at 5 sec?