Hydraulic Service Wrenches

Starting to do a lot more hydraulic work and I'm realizing I need some compact short wrenches like the Martin set. What are you mechanics using? Im just trying to be smart and not just buy buy buy, I spent alot of $$ on tools these past couple years. Maybe I dont need a whole set and I can just buy the common line sizes instead. Thoughts?

Hydraulic Service Wrenches