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One of the best indicators of proper balance setting on AC is the "etch zone" adjacent to the weld bead. A large etch zone indicates that you're probably running too high on DC+. I've found that on new/clean aluminum, that on the Syncrowaves, a balance setting between 7-8 works well.
You may wish to try the 2% Lanthanated tungsten. Takes heat a lot better than the pure. It will still form a ball, but not as large as the pure. Also, I've found it doesn't form the series of small ba11s around the tip as the Thorieated does. Most LWS do not stock it. I get mine from tungsten-direct via the internet. I use it on both the transformer and inverter tigs.
I wouldn't worry too much about the pulser on aluminum at this time. I seldom use it on aluminum. Now thin SS is a different story. I have used the pulser, with new guys I'm working with, to help develop their dip timing.
Comparing mig to tig is a difficult proposition. Kinda like comparing shooting a rifle to shooting a pistol. I can leave the rifle in the safe for months at a time, pick it up and still shoot "dang well". On the other hand, if I don't shoot a pistol pretty regularly, I can quickly see a drop in accuracy. Tig welding requires not only the knowledge to perform the task, but also the development of the multiple motor skills (muscle training) to do it well.
As far as your "point gap settings", if you're getting consistent arc starts in both AC and DC, then your gap setting is probably fine. I've never had to adjust the points on a new Syncrowave. Sounds like, what you're experiencing in AC is the normal transition of the wave from DC- to DC+. The HF will be on continuously as it is needed as the squarewave passes thru the 0 (no current flow) state. This is happening at 60 cycles/sec.
Taking a "tig course" could be beneficial, however, my experience is that there are very few really "good tiggers" teaching welding. It is amazing though how just a few hours, one on one, with a good tigger can help to shorten the learning curve. Dallas/FW is a large area. Possibly there's a good tigger in the area that would be willing to work with you for a bit. If you were closer, I'd be more than willing to spend a little time with you getting the basics down.
As far as "where the inverters shine" that's a whole story in itself. By increasing the frequency, you're able to better focus the arc. This can result in deeper penetration and a narrower bead. I really like and use the high speed pulsing on the Dynasty for welding SS. All these things are "nice", but remember we've been tig welding materials for years without all these "bells and whistles". Give me an experienced tigger with a 330 A/BP (sine wave machine) and he'll run circles around a new guy with a Dynasty 350.