And if your line is stronger than your reel / rod, your reel and / or rod might brake as well. If the leader is stronger than your line, your line will break, and you'll loose your cage feeder / sinker as well. Then you'd only loose your leader, hook, and bait. It should always brake first, in case you get spooled by a big fish.

The mono leader should always be the weakest link in your setup, as it's the cheapest part of your setup. The one that comes closest to your rod's max test without going over it would be the mono leader 0.14 mm (0.0055') with a test of 2.5 kg (5.5 lb.). But with the feeder rods, you also have to equip a mono leader. With every other setup, you would then choose a line that has a slightly lower max test, and be done. In that case, you could use the CrucianHunter 3000, with a max drag of 3 kg (6.50 lb.), the InspireCast 3000 (2.9 kg / 6.40 lb.), the WinCast 2500 (2.9 kg / 6.40 lb.), Espira Slim 2500 (2.9 kg / 6.40 lb.), etc. You would then choose a reel that has an equal, or slightly lower max drag. It has a max line weight of 3 kg (6.50 lb.). The first feeder rod you can get is the CreekPro 240 (7'10'), which unlocks at level 3. Like with every setup, you should first choose the rod you'd like to use.

But, to get you started, here's the basics: Like it would be easier for us to give you advice, if you could provide us with your current level. Some stuff only unlocks later in the game, and it's hard to find suitable line/leader/reel/rod combos that won't break your gear, but on the other hand will max out your rod. It's really not that easy to build a well-balanced feeder setup, since the leaders, lines, and reels make it hard to max out your gear - especially when you're still leveling.

Best 5 rod setup fishing planet