User blog comment:Poisonshark/PS's ideas on classes 2: Ability kits/@comment-8008166-20140820193436

Marksmen/women abilities are pretty standard:

Their passive is usually something that helps them output more damage, however there are the strange ones like Urgots Passive which deceases the the damage of enimies. The second most common Passive is a speed buff of some kind.

Their next three skill comprises of 3 of the 4 skills,

1. A damaging skill

2. A dash/gap closer

3. Some sort of steroid

2. Some small CC.

Go ahead pick any marksman and look at their Q,W and E and you'll see thir 3 out of the 4. Example, Vayne: Q=dash, W=steroid, E=CC. Or Jinx: Q=steroid, W=damage, E=CC. Of course there are variations, but all of them can be simplified thoe those 4.

Ultis are random and are made to suit the kit or the personality of the champion.