One of my go to rides is a 9 mile stretch with 4 significant climbs - half mile or so and 12% + grades. Now that I'm getting strong enough I go to the end and turn around and go back. Only 2 significant climbs that direction and some more gradual ones.

In my mind this is what I'm thinking is meant my hill repeats in that I'm doing 6 significant climbs with each followed by some down hill sections. However, these hills are long enough and steep enough that it's all I can do to make it up each one. Sometimes I'm wobbling around at 4 mph. I am getting stronger and make it further each time before going to my lowest gear and pedaling squares the rest of the way and I can make it up a couple now without the lowest gear.

However, I'm wondering if I should be doing something differently. For example, should I sprint up one of these hills as far I can before crapping out and then turn around, roll down and do it again a few times then move on to the next hill? Is it more important to sprint up a few times vs just torquing my way up each one?