Philstone is actually a pretty bad item. Carries should never get it. Usually you see it on support champs who are hanging out in lane letting the carry with them get all the cs. Also so they can build a shurelya's out of it. The Tenacity item that builds out of it, though, is terrible because the only place philstones are useful is while laning so you're harder to push out, after which regen is a pretty irrelevant stat.
Rumble is really cool. His flamethrower has a 1.5 AP ratio if you can get the whole thing on someone (with a rylais you can if they don't have a blink), and in the danger zone the ratio is close to 2.0. 1.0 ratio if you can land both harpoons on someone (1.3 in danger zone). And his ult, regardless of ap ratio (.5 initial, 1.25 over time), is amazing area denial in a team fight. Brutalize the fuck out of your enemies in laning with flamethrower at level 1, never let them recover from it. D.Shield, Rylais, Mercs, then tanky or ap or whatever the game needs.
Vayne's 6300 IP, so sad. Silver bolts maxes at 70+8% max health of true damage. yessssss.
Need a team of like, Mundo, Shaco, Malphite, Renekton, and Nida or Kat. Allchat KILL THE BATMAN at all times and always focus Vayne.