What are the deepest Sciton Halo laser settings you use?

A deeper setting is safer for darker skin types and patients with concern for PIH. Shallower settings produce more heat and are better for targeting pigment, which lives closer to the surface. For someone with Melasma or PIH where pigment is an issue but heat can cause worsening, somewhere less than 500 but greater than 375 would be the correct depth. 
The most effective Halo treatment to address your aesthetic concerns will depend on your particular skin condition. Often combinations of BBL and Contour TRL with Halo can be the best way to achieve optimal results with the least downtime and best safety profile. 

I agree with Dr Pozner on the settings. Deeper with Halo is not always better. With Halo a lot of the wrinkle and tightening settings are actually adjusted with the 2940 ablative erbium. This is what makes Halo special. The 2940 and the 1470 are delivered together right on top of each other. With a deeper 2940 we can create an  ablative setting that heals like a non-ablative laser. As you are asking about a deeper collagen improvement, I will combine halo with RF microneedling in successive treatments. This gives the best skin improvement with Halo and the best tightening with RF with the least downtime. 

Deepest or more aggressive is not always best. Skin thickness varies by individual and by facial area. The goal of the Halo laser is to get optimal skin rejuvenation with minimal downtime. For deeper lines and more photodamage we use the Sciton TRL full field erbium laser. With the Halo, spot size increases with 1470 depth so a 700 micron setting uses a pretty wide spot - too wide for most areas and people.We are posting some Halo and other procedures on IG under sanctuaryplasticsurgery