User blog comment:Conqerer2/NoobPlay/@comment-4636093-20120223185014

Riot made it so that it's easier to buy Tier 1 and 2 runes with the ability to merge 5 together to make a random one. However the lower tiered ones make a hardly noticeable change so it's really whatever you want.

I recently hit level 30, (haven't tried Ranked yet) and was going to actually do something like this, it is a nice read.

Be aware that level 12 is when things get fun and you get the uber-powered summoner spell Flash. It can be hard to use at first but after you practice with it it's simply the best.

Of the 3 champions you have, I'd say Cho'Gath is the easiest, far less item dependant than the other two (just build whatever has armour/magic resist) and hardly ever dies while bringing a lot of CC and even some damage if you build some AP.