Step 1

Buy 6-Link lvl 82 Maraketh Bow ~20c

Step 2

Alt spamm until you have T1 damage over time multi ~200 alts needed

Step 3

If it's the only mod - move to step 4
If not - use Orb of Annulment to remove Prefix (50% chance to remove Prefix)
If you remove Suffix - move to step 2

Step 4

When your only mod on the Bow is Damage over time Multiplier - use regal orb

Step 5

Remove mod you have got after using regal ( if it's a suffix - use orb of Annulment. If you delete damage over time - move to step 2)
If it's a prefix you can use 'Suffixes can not be change' benchcraft + orb of scorching to guarantee removing a prefix or use orb of Annulment(50%)

Step 6

Use crafting bench to add Multicraft (2 ex) + cannot roll attack modifiers (1 ex)

Step 7

Use Exalted orb to add '+1 to level of socketed gems'

Step 8

Use Hunter Exalted Orb to add 'Chaos damage over time'

Step 9

Use crafting bench to re-add Multicraft > +2 to level of socketed support gems >
Damage over time multiplier (2 ex + 2 ex + 5c)