With safespot it's best to use the dedicated hotkey for it (F6), if you're using mac lmk, I think it's fn key for you guys xD After that, the tile should light up green indicating the safespot is set. Also are you using cannon mode? If so then it's best to use the [Fight alongside cannon] if you plan on ranging, or you can just let it stand on the safespot. The fightbox can be used for a couple different things, either to assign an area where you can choose to only fight npcs inside it, or to loot items inside it, or to keep your player standing inside it, either one works. For safespots its best to avoid using a fightbox unless you want to loot items inside it. The [stay inside fightbox] option is good for melee especially.
As for the above query, which npc is this if you don't mind my asking. Is it a multi-combat npc, and are there aggressive (other type) npcs who will try to attack you before you get to your actual fighting targets? Lmk!
Progressive mode technically it's supported but it requires a lot of configuring. So if we want a nice fluid progression system in place we should ideally have a couple profiles saved and then we can chain them together, so a chicken killer profile, a cow killing profile, hill giants and assign them to cycle at X levels (att, str, def) so 1-20 chickens, 20-30 cows, 30-60 hill giants etc. I gave you a trial but I recommend waiting until we add a better and easier system which is friendly for goldfarmers. I'm working on a way to have all the options for different fight areas/npcs all accessible within a preset tab and then offer a way to make small adjustments to our likings etc.
Range progression not yet but we're working on it. No dart upgrading/checking yet but it will definitely be added in the future. We're also working on adding ranged to the progression/task system.