the correct temps would be 85-88F on the hot side and about 75F on the cool side. most caresheets also say a basking spot of 95F.
with humidity you want to shoot for 60%. no lower the 50%. as for the duct tape...here in AZ in the middle of winter i have to cover most of the screen with duct tape to get any humidity. just fiddle around with different amounts of duct tape till you get the humidity where you want it. you might still have to mist. if your using a heat light, put it over the water bowl. if you have an under tank heater, put the water bowl over it.
you should also read a couple caresheets online and refer to them when you need a reminder on esomething like temps and humidity or other such things.