I'm not the best on PVC bends either. Mine will pass, but are not works of art. I need to make a board with spacers for the most common offsets I do. Trouble is, I can't carry but so much stuff around.
Torches are very hard to control, I gave up with them, unless bending for a ditch. I mostly use a heat gun now. I can't afford the blanket or trough heater. If one has time, a homemade heater can be made a lot cheaper. I saw a guy who made one with a 4 foot cut of 4 inch EMT. Hole sawed a hole in middle, just large enough for a heat gun go blow into. Made legs from 4 standoff straps and 4 cuts of all thread. Set up, put pipe in and set heater under it on its back end. He had some kind of spacer to keep PVC centered & prevent center burning. It worked well enough & he saved a lot of $ on it. Similar could be made with lots of things. I also saw a toaster oven hole sawed on ends. It worked OK for short bends, could only heat up 12 inches at a time.
If you work a large job where masons have a sand pile in the sun, see if they will let you bury some lengths in their sand. A few hours in the sun will have the PVC very soft, slight bends can be done as is, some heat still needed for sharper bends. It gets you a head start anyway. bury the main length and leave ends out. Don't get them full of sand, that's trouble. Or lay out on hot asphalt or concrete a few hours.
The factory offset nipples are good for some short offsets and are easy to keep & carry.
I need to make time and bend some scrap pieces to 15, 22 and 30 degree bends, cut them short and have them handy. I could put together various offsets that way and have much less dog leg. Too often in the field, there is no good surface to lay things flat and heat, bend, wipe effectively, especially working alone.
I would like to see 15, 22 and 30's sold at supply houses. I think EMT bends were once sold that way, years ago. Now, 90's and 45's are the only ones I see.
