[SINGED] New Passive Idea: Gas Pressure
Singed is all about spamming laugh playing with pressure, and I think it would be cool thematically and gameplay-wise if his kit also revolved around pressure. A lot of Singed players realize that Archangel's and RoA are usually sub-optimal build picks despite the innate synergy. My suggestion is that his current boring and relatively useless passive is scrapped completely, along with his use of mana as a resource entirely.
Singed's resource could be gas pressure. Singed could indefinitely cast his poison trail, but to a diminishing effect; without considering any numbers at all, a low pressure Singed might have a poison trail both smaller in size and less consistent (rather than a continuous stream). A high pressure Singed on the other hand would have a larger trail, and at max pressure perhaps there could be an interaction upon double-tapping Q that would release a large radius gas plume, poisoning and blinding enemies. This could be a volatile (/L) resource that is lost while casting Q, and builds up while not casting Q. While ulting, pressure would increase at a substantial rate.
Since Riot is no stranger to compound passives, it would be great to see his shield come into play as well! It's been suggested several times that the direction Singed faces impacts the amount of damage he takes-- i.e. facing the attack head on with his shield reduces damage.
I think both of these changes would make the oldest champ in the game more interesting and stylized. He's already the most unique champion, but it would be cool if he was enough of an oddball to have his own resource. Upvote if you agree!
EDIT: After a day of comments, this has garnered a lot more attention than I expected. I want to give a big "thank you!" to everyone who has increased the visibility of this post and has commented with their own interesting ideas! It's encouraging that so many people agree that Singed's kit has a lot of potential, even without being too complicated. Here are a few refinements that have cropped up in the past 24 hours as a result of concerns and brainstorming in the comments section:
The standard rate of gas pressure growth could increase upon ranking up Singed's ult at 6, 11, and 16, so that Singed's resource doesn't feel infinite in the early game but is still liberal in the late game.
Singed's E, W, and max pressure plume could cost him some gas pressure to use, and the strength of E and W could be impacted by the amount of pressure Singed has.
The max pressure plume might be too toxic in early lane phase; it could be tied as a passive to Singed's ult. Alternatively, it could be given a decently long cooldown.
Building mana could be worthwhile without being mandatory. Even if Singed's resource isn't mana, his "amount" of mana could be recorded in his passive. His shield's damage mitigation to front facing targets could scale off of this number. So if you want to be a very tanky Singed who faces all of his troubles head on, mana is still your friend.
