Makeship tent flys or canopies work in colder weather, but the bugs get in for the rest of the seasons.
Bivies are ok for lean too camping a d fair weather, absolutely miserable otehrwise.
A 1 man tent is ok for a minamilist approach, but they typicaly need to be teatehred for support as they are not freestanding (typicaly). Works ok in woodlands, not so in above treelien where there si a lot of rock to contend with.
A light 2-man is the best option as there is plenty of space for gear. There are a lot of svelt models on the market. The tents typicaly rin like this:
1) no name or off brands: ok for 1x a year sdhort trips. Seems are not as well stitched, water proof coatings are thin and they tend to use fiberglass over aluminum. These tents will fail on you. No deal is good when stuck outdoors withotu proper shelter.
2) Brands like Eureka, coleman are quality tents. They range from budget to mid range. They have better material and design.
3) High end liek Sierra, northface, EMS tend to be higher end. They use lighter materials and quality design and will last a lifetime with care.
Check out Campmor, EMS and LLbean. There area lot of tents in the 1-2 man variety. Check out backpacker magazine for un-biased reviews on many of the popular models. They run 1 review annualy for thents in this class.