Step 1: Make a character level 19
Step 2: Get enough materials to construct 40 Eternal Divination Necklace lvl 20
Step 3: Have enough space in you bag to construct 20 Eternal Divination Necklace lvl 20 and all of them needs to be show in the same bag.
Step 4: Turn all 20 Eternal Divination Necklace lvl 20 at the same time
Step 5: Check your Eternal Divination Necklace lvl 20, there should be 1 or probably more Eternal Divination Necklace lvl 20 with Torrent 6 which could be change to Skulldraga 6 if you convert the item to warrior and then turn it to wizard, if not repeat step 3 and 4.
Note: High Luck is key to get those Torrent 6 easier, you could ascend a char to get the +200 Luck trait and make it level 19 and then ascent another char to make equipment level 38 (That other char needs to be level 37 <—very important, don’t pass level 37 or the equipment you construct cant be use by the level 19 char), then construct items with the luck trait until you get a cyan luck equipment level 38 to use on your level 19 char. This way you will get more than 900 Luck %, that all you need on your char level 19. You could also try to wait for the 5 min bonus item quality to make the equipment and you could go even more hardcore and use a red map plus +5 min item quality bonus to make the equipment peace, or go 4K ULTRAHIGHDENSITY and use an Eternal Map+5 min Item Quality Bonus+The Luck train ascendant char Level 19+ Enought cyan Luck piece to max and you could reach 1400%+ Luck before construct those eternal Divination Equipment.
Psst: If you do the last line of my comment, DONT RUN THE MAP (You will surely be kill a lot), just make the pieces and enjoy.
Equipment pieces with luck trait that you could make until get the cyan luck trait: Warrior Chest (Hide of the Faun), Warrior Head (Grace of the Faun), Warrior Ring (Spirit of the Faun), (Warrior Amulet (Blessing of the Faun).
Note: High Luck and a level 19 Character to make the equipment pieces is the Key.
And you could make it even with a normal (not ascend) level 19 char without high luck but you will need to construct more eternal pieces to get that lucky 6 in Torrent.
The level 19 character is only to make the equipment pieces level 20. If you put equipment pieces level 20 in a level 100 char, when you go to the Arena with the level 100 char you will see that the number in the equipment pieces level 20 dont change, i mean that if the equipment piece level 20 have a 6 in Torrent, it will keep the 6 if you go to the Arena. The only piece this doesnt happens is in the Trophy piece, i mean Trophy pieces should be level 100 to maximize it.
When you make an equipment piece level 100 and go to the arena, the numbers are affected in all the pieces (Trophy numbers in campaign are the same in arena), but if you construct 6 pieces level 20 and go to the arena, the number you see in the campaign are the same in the arena (Equipment pieces will behave like the Trophy, no modifications in the numbers).
Do 6 pieces level 20 (Main Hand lvl 20, Off hand lvl 20, chest lvl 20, head lvl 20, ring lvl 20, necklace lvl 20) and check the numbers, then go with a char (any level char using the 6 pieces level 20) to the arena and all will be % crystal clear (The numbers are the same that you already saw in campaign) . In the arena the system adjust the numbers of the equipment pieces except for pieces level 20.
Equipment level 20 with Torrent 6 in campaign will have Torrent 6 in Arena.