Yes, I am a vendor here, but I have also been wheeling for many years. Have introduced many people to offroading and here are my recommendations.
I would suggest a strap to go with your shackles. IMO if you get stuck (more likely than blowing or popping a tire) being able to pull out your strap and getting a quick rescue from a fellow wheeler is wise money spent.
I've used straps dozens of times. A highlift maybe a handful.
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I'd also recommend an air compressor is invaluable. Airing down and up again is almost mandatory for offroading. It's a drag to have to ask someone to borrow their air compressor, and having to wait until they are finsihed doing their air up before you can do yours. Then everyone is waiting around for the guy who didn't come prepared LOL.
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Along with the air compressor get yourself a basic tire gauge. We will provide one free with any air compressor purchased.
Cheers
Mark