High Repulsion and Tension stability for 4 weeks

I play badminton 6 hours per 1 week. (24 lbs)
Now I like high repulsion string. Can you recommend tension stability strings for 4 weeks.
In present, I use BG66UM. but I have a problem, because BG66UM is reduced tension stability after 2 weeks, and continue reducing. (I love BG66UM from my first touch)

Then, I interest...
ZM62
ZM65
Li-ning AP62Plus

Can you tell me about 3 strings or your recommend strings are enough for 4 weeks or not.
(more than 4 weeks are not necessary, because i often change string every month)