To "buy low," use a limit order?...or sell puts?

I sellputsthencalls against exchange traded funds in my IRA.  In the last month, I had an interest in buying XLE, the ETF that holds 28 energy stocks.  On 12/23/19, it traded at $59.88, but I wanted to buy low, at $59.71.  (In this discussion, all XLE prices reflect the dividend adjustment for the $1.79 div that was paid on 1/3/20; except for the XLE put premium, which was not div adjusted.)

Consider 2 alternatives:

• I could have used a limit order to buy XLE lower, at $59.71, good-'til-cancelled.  Had I done so, since XLE dropped below $59.71 on 12/30/19, I would have been a buyer on that day.  I'd have then sold the 1/17/20 covered calls against my XLE shares to help me to sell high.  
• Instead of using a limit order, I chose to sell a cash secured put against XLE to help me to buy XLE low.  I sold the XLE 1/17/20 put with a $59.71 strike price & was paid a 93 cent premium into my IRA on the next day.  Of course, for accepting 93 cents, I also accepted the obligation to buy XLE shares at exactly the $59.71 strike price if the price of XLE dropped below $59.71 from the time I sold the put until the close of option expiration Friday, 1/17/20.  During that time frame, XLE moved below & above $59.71 a few times.  On Friday, 1/17/20, XLE closed 59 cents below the strike price at $59.12, the put was assigned against me, & I was forced to buy XLE shares at the $59.71 strike price.  My put premium adjusted cost for the XLE shares was $58.78.  I was pleased.  My XLE shares were bought quite low.  But since then, my XLE shares are trading lower, currently at $57.28.  I want to sell the 2/21/20 covered calls against my XLE shares, but with XLE this low, I'm waiting for XLE appreciation.

To "buy low," is it better to simply use a limit order?...or to sell puts?