Passive; voli
Q; trundle
W; brand
E; jax
Ult; lux

Darius passive, Jax's Q, Rene's W, Fiora's E, Olaf ult.
This would give me very good assassination character witch is what i like to play being that i have a DoT, a gap closer, on hit stun, attack speed steroid, and inviolability to CC.

Morde's passive, nocturne's q, fiddle's w, Viktor's E, and finally Darius' ult.
this combination keeps generating shield and health while obliterating anything that gets too close.

Passive: Ryze
Q: Evelynn
W: Zilean
E: Doesn't matter, maybe TF
R: Karthus.

Farm until lvl 6, then stay in base and spam R.

Alternative:
Passive: Annie
Q: Evelynn
You can't do this while stunned.

Like Verandure, but more efficient IMO.

Malzahar's passive
Karthus' Q
Sona's W
Sona's E
Kog'maw's R

The four shortest cooldown spells I can remember from experience, including the ult. Mad pushing power in mid, because who wants to face 50 Voidlings all at once? (Q, W, E, R, VOIDLING! Spam this combo with Archangel's for maximum mana for spam.)

passive: darius ult
q: darius ult
w: karthus ult
e: olaf reckless swing
r: dravens ult

i think im doing it right.

Q = Sions Stun,W= TF Stun,E= Taric stun, R= Sona Stun. Passive not sure about.

Make the ultimate stunning machine impossible to gank as he will just stun you to hell. Put all that on Tristana with her passive for AA range and then fire away.

Passive: Ryze
Q: Nasus
W:Lee Sin
E: Olaf
R: Kassadin

afk farm q with your infinite sustain and harras thru E
Then blink to them and 2 shot them with your godlike EQ combo.

volibear passive, nasus Q, rammus W, Kat E, tryndamere R

Passive: Veigar (Moar mana)
Q: Ahri
W: Xerath
E: Taric
R: Kog'Maw
Everything besides the W and E are just kind of there for the hell of it. Basically, farm 'til 6, then go into mid brush, hit w, and ult top or bot.