Best in Slot

It seems that for this achievement, you need:

9x [item=200082]
9x [item=200080]
9x [item=200084]
9x [item=200083]
9x [item=200081]

3x [item=200086]
2x [item=200085]

The greens drop from Prismatic Leaper Pools, Ice Pools, and Lava Pools. All greens drop from all pools. The droprate is noticeably higher in Deep Ice Pools and Overheated Lava Pools.

[item=200086] drops from rares spawned by [item=194701], not the normal/massive lunkers.
[item=200085] drops from the nets at fishing holes. Some have reported getting these from lunkers, but I couldn't confirm.

For prep, I got a [item=198226] w/ Enchant Tool - Draconic Perception and put in Crafting Orders for [item=191354].

Perception is everything with these materials, as they seem to count as 'rare drops.' This also applies to coins for Swog Bags.

For the greens, I simply grinded Ice Pools, making sure to keep the spot stocked just enough to be 'Rich.' I opened every Ice Crack as they spawned until one was Deep. If there were none, I fished the normal pools.

For the rares, I kept up on my nets and sat in lunker farm groups until I had everything. I was able to just afk in various lunker groups until a rare spawned, tagged, looted, and went afk again.

Hope this helps.

whats the point for these upgrades apart from the achievement? By the time you have all these materials, you should have already caught all the lunkers.

As already said, farming Prismatic Leaper Schools is the most effective way to get this achievement done. There are 5 spawn points in Ohn'ahran Plains (here) and the pools will respawn before you would finish the round. So you don't have to hunt for Overheated Magma Pools or Deep Ice Holes, both of these have lower drop rate, at least for me.

I have used fishing buffs suggested here + few others that are cheap to get or you might have them already without even knowing:
- [item=198226] max quality + Enchant Tool - Draconic Perception
- [item=191354] q3
- Nat's Drinking Hat, or any other hat that gives you fishing buff + applies lure to your fishing pole (if you don't have any, simply use some kind of lure)
- Scalebelly Mackerel + Captain Rumsey's Lager, both very cheap to buy so you can use them all the time
- [item=50287] (I don't personally have them, but definitely so good)
- Enchant Gloves - Angler - work with low level gloves
- Sharpened Tuskarr Spear, I recommend to use this if you happen to find 2 pools at the same spot, most likely at 58,31. + The spear will stay there for the whole duration so you can benefit from the buff multiple times
- Kalu'ak Figurine q1 is enough - only difference is in duration, use q2 when you find double spawn
- Trawler Totem, wait for double or simply use it on cd

If you have any other tips for consumables or toys please let me know.
Good luck!