This purely depends on how much cash you have, and how important time and money is to you.
99 strength would be MY first selection, because 99 strength takes far longer to get than 99 ranged and can be quite a pain in the ass. However, if you have very little cash, 99 ranged would be the better choice as you can get 99 strength almost for free.
Just incase you didn't know though - 75/80 - 99 ranged costs very little (maybe 15-25M) with red chins. It is also EXTREMELY fast, which makes it worth the cost. I got 80-99 ranged in about a week, and I was taking my time. I did 97-99 in about 7.5 hours all in one sitting. At your peak, you can expect roughly 300-400k exp p/h with red chins

The only drawback with chinning is if you
don't want HP exp. If that is the case, then go 99 range with zeals obvs.
With all that info to consider, I hope you make the best choice for you. Good luck!