You should aim for having ~15 stacks when you buy your Wriggle's Lantern. Warwick has so much sustain in the jungle that he can stay in it forever which helps stacking up your Feral Flare.
#FERAL FLARE LANTERN MINECRAFT RANGE PATCH#
I have played a lot of games so far since the season 4 patch and few since the Feral Flare patch with the item. This is a great option for anyone that wants to get to late game a little faster and gank earlier (with ult), but you lose out on other stats so make sure you are aware of that when dueling, especially during early game. I also like messing around with Greater Quintessence of Experience so I can get to level 6 faster. It will speed up clears faster than any other stat on Warwick. I generally run these with Greater Mark of Attack Speed since I always want to have some attack speed in the jungle. I like Greater Quintessence of Movement Speed on Warwick when I wanted to have fun. Sort of like marks, I think quints are a personal preference. I like being faster than other champs and since it speeds up your jungle clears it gives you potential to roam to lanes or counter jungle faster than your opponent.
I like Greater Quintessence of Attack Speed on Warwick just for faster jungle clears and quicker procs for my on hit items.
#FERAL FLARE LANTERN MINECRAFT RANGE PLUS#
By the time you starting needing any magic resist, you have almost as much as the Greater Glyph of Scaling Magic Resist plus even more into late game. I like to use Greater Glyph of Scaling Magic Resist over Greater Glyph of Magic Resist because as Warwick, a lot of games you will not leave the jungle before level 6 making magic resist useless early.
I like to use Greater Seal of Armor because it makes you really tanky early game. Greater Mark of Attack Speed is the other type of mark I use often. I think marks are more of a personal preference, so I mess around with different marks all the time. I like to play with greater mark of hybrid penetration because they are just more damage since Warwick's damage is generally pretty hybrid so it works well with the whole build.