-have you considered adding a second lever to his kit?
Sustain/self-healing of some kind would fit pretty well with his character theme. He's been out since 2010 and he still hasn't gotten to eat anything. The little guy is probably getting hungry.
drake102nd1 votesthe only problem is how does an adc eat enemy units? we cant have him be a mini chogath, and if he melts it at range and consumes it that's too velkoz and not kog style. Kog is a walking infinite stomach. hence the continual regurgitating of bile and acid.
plus looking at kindred adc we can see why adc's tend to not have self healing integral to their kit.. and it would let him jungle to a point which is the only thing holding back devouer kogmaw (may it never be a thing, even im disgusted and i play kog as one of my main adc's).
Rebonack2 votesthe only problem is how does an adc eat enemy units? we cant have him be a mini chogath, and if he melts it at range and consumes it that's too velkoz and not kog style. Kog is a walking infinite stomach. hence the continual regurgitating of bile and acid.
plus looking at kindred adc we can see why adc's tend to not have self healing integral to their kit.. and it would let him jungle to a point which is the only thing holding back devouer kogmaw (may it never be a thing, even im disgusted and i play kog as one of my main adc's).
Kog being able to clear the jungle and remain healthy isn't what's holding back Jungle Kog. He can do a full clear with decent speed and end with full HP and mana to go gank with. His ganks are just really poor. If Riot buffed the level 1 slow on his E a bit, then it might be a little more workable. He would still be super-vulnerable, though.
HOWEVER!
To answer the initial question, something like-
Passive - So Hungry: When an enemy champion dies near Kog'Maw they leave behind Delicious Snacks. By walking over the Snacks, Kog'Maw devours them, recovering HP, refreshing the cooldown on Bio-Arcane Barrage, and clearing all stacks from Living Artillery.
No jungle sustain. No lane sustain. But if Kog kills someone who dives him, he can heal up and get right back into the fight.
Alternately, it could be something simple like-
Passive - Eldritch Acid: Kog'Maw's basic attacks deal (percentage) of the target's max HP in bonus magic damage OnHit. If the target is a Champion, Kog'Maw is healed for (percentage) of the damage dealt.
drake102nd2 votesi think the 2nd one would be a bit strong. it would be too easy to fight other champions especialy after buying lifesteal like if xin's w passive was on every auto but only on champs.
i like the first one though. the ult doesnt really need a refresh but i like the stack reset, but to prevent super spamming because of its late game strength maybe do a 
style. it losses a flat number of stacks.
but then he gives up his suicide bomber mode which is fine. where would you buff/trim his other abilities then? because his lack of survivability is what keeps him from being too oppressive early game due to his power with just bork is drastically higher then most other adcs with one item. the hardest part is just getting to the bork without falling too far behind.
Rebonack1 votesi think the 2nd one would be a bit strong. it would be too easy to fight other champions especialy after buying lifesteal like if xin's w passive was on every auto but only on champs.
's why I leave the numbers wide open. OP/UP is always tied to the raw numbers. Unhealthy is tied to the core mechanic. Would it be OP if it did 2% max HP damage and healed for 1 health? Probably not. What if it healed for 100 health? That would likely be an issue. So it stands to reason that there's some value between one and one hundred that would be workable.
i like the first one though. the ult doesnt really need a refresh but i like the stack reset, but to prevent super spamming because of its late game strength maybe do a
I do too! It's a very thematic Passive that fits well with Kog's champion identity. It also puts Kog at a bit of risk to take advantage of it, since he needs to waddle over to where an enemy champ just died. He would need to be careful about picking the right time to eat up.
but then he gives up his suicide bomber mode which is fine. where would you buff/trim his other abilities then? because his lack of survivability is what keeps him from being too oppressive early game due to his power with just bork is drastically higher then most other adcs with one item. the hardest part is just getting to the bork without falling too far behind.
Yup, suicide bomber would be gone. It's a really strong Passive. Kog may as well have a second Ult that triggers every time he dies. But ti really doesn't help Kog fill his niche at all, which is why it should have been taken out while the rework was still reworking. Unfortunately, Graves and Cait took more of the focus in that regard and Kog was left with half a remake. Being able to invest that power back into his kit would really help Kog to fill the team role he's meant to.
drake102nd1 votesmmhm tho regarding the 2nd one, the problem with building flat or % health regen is if he's still AS based he would heal way too fast once he has bork / Deaths dance etc.
and his current passive doesn't fit super well from a lore point but if you think about it from a gameplay point it fulfills the same role as a Zyra and Sion passive and letting him try and keep up early game.
also would the snack regen a flat amount or a percent amount? and this would require kog to get a buff to either his base stats or ability stats because the snakes are nice post 6 and post fights. but kog loses most pre 6 fights and if he doesnt fight he is easily bullied out of lane. how would that get equaled so he can still be playable pre 6.
assuming your support is not super god mode pro level.