extension springs Whats better

What are the pros and cons of 2 vs 4 EXTENSION springs.  Not alot of info on the web.  
 

steel insulated Door is 16 x7 and  220 lbs. heated garage

Door is used alot cyceled 5-10 times a day.    and been using 2 red 250 lb springs on it .   In twenty years Ive replaced springs twice.

I just had a spring break and was able to put and old one on there till I order new ones.    My neighbor suggested I put 4 110lb springs on as his fathers house has them this way.   



do smaller springs allow more or less cycles?

Thx

Jeb

Here are some pics

[url=https://servimg.com/view/20281402/9][/url]

[url=https://servimg.com/view/20281402/11][/url]