This is just MY OPINION. It depends on whether targets are deep or not...and whether there's a lot of iron or trash...and how mineralized the soil is. Start with basic 1. Change silencer to -1 and switch to full tones. Change discrimination to between 4-6. Be sure to manually ground balance or pump. Don't use tracking unless there's hardly any iron. Have an identical program with 4K frequency loaded next to your modified basic 1 to crosscheck targets. Switching between 4k and 12k has been ideal for me. For mid to high conducters, the tone and VDI will increase on a nonferrous target as you go from 4 to 12. From 12 to 4, nonferrous targets will decrease in VDI and tone. If a target goes up when it should go down or vice versa, then you're probably over iron. If VDI and tone are very close between freqs, then I find the targets are usually not coins, but a nonferrous relic of some sort. If there's a lot of iron, be careful because you really have to isolate a target to make this test productive. Also, don't trust out-of-range low conducters in 4K...4K is better suited for mid and high conducters (but I've been surprised how deep it'll hit a nickel). These rules (that I use) apply to coin-sized targets less than 7-8 inches--don't trust these rules for deeper targets...start digging

If you dig a lot of deep trash or iron, start using pinpoint size as a discriminator on how much you dig.
Optimally the soil will not be mineralized, no trash or iron and targets will be 7-8 inches max. If that turns out not to be the case, and as you learn the site, adjust reactivity to 1 to get a little more depth if you need it (to 0 if you really need max depth, but you'll need to swing a little slower). If you need to filter out some of the iron, increase silencer up incrementally, but be careful, one of the great things about full tones is you can hear a lot--increasing the silencer filter may affect the benefit of full tones somewhat...I'd hate for you to miss something because of too much filter. If you find the site is just loaded with all kinds of mischief, then up the reactivity to get better separation. Be sure to switch silencer back to the desired setting every time you change reactivity...silencer changes automatically when reactivity is modified. As you go higher in reactivity, it'll be important to keep silencer at -1 or 0...because reactivity 3 and higher really cuts your depth.
Since you only get one shot at this place, bring an external charging method with you...or a spare coil if you have one. If the site is dense with trash or iron, use the smallest coil you have just to make it a little easier to separate good from bad. Watch some of the youtube videos on the Deus...invaluable info.
Also, get an early start, I have a feeling you're going to be doing a lot of digging!
Have a great time and good luck!