C gussets, Chromoly Axleshafts with full-circle clips, don't drive like an idiot. That should be enough to run 37s on a Rubicon until you can afford to go bigger if that's what you want.
Your factory ball joints and possibly your unit bearings will wear faster depending on your setup, so just keep your eye on them and upgrade as necessary.
Like you keep saying, you're just getting involved in the sport... Wheel your Jeep and you'll find what you need to upgrade to accommodate what you do as you go along. Don't be one of these idiots that spend a shit ton of money all at once and then end up having to sell your Jeep once the credit card bills hit.
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Build Thread - Adventures of Fiona -
https://wayalife.com/showthread.php?t=47407