Roaming has become a popular addition to the metagame strategy, wherein one player does not lane nor jungle, but rather simply moves through the jungle/river to initiate ganks on lanes from level 1 and onward, until the teamfight portion of the game begins.
A roamer essentially guarantees that you're either running a solo lane, or two solo lanes if you have a roamer and a jungler. I've also seen a double roamer game played, though this tends to be less effective as enemies who are wise start playing defensively and reduce the effectiveness of your roamers, which put them behind in both CS and levels.
The qualities of a roamer can vary, but the general requirements are that they are mobile, can do burst damage, and have a strong stun or position altering (push, throw, etc.) ability. Taric, Evelynn and Alistar are all very popular choices for roaming. I've also seen Sion and Blitz play roaming effectively, but they were both out of a lack of a jungle spot on the team and normally suit better in a lane.
This strategy is similar to the "double jungle" mindset in that you get three solo lanes, with the exception that there is extra pressure on getting early kills to succeed. A definite risk vs. reward tossup, as successful roamers will quickly catapult your laners ahead in level / CS as well as demoralize your opponents, but unsuccessful roamers will fall just as far behind due to the lack of their presence in the laning phase.
There is a way to see the skills of enemies altough not all i think (It's been a while since i checked it). If you die and you click on death information (seeing wich enemy killed you and such) You will see what skills did damage to you and some information, also it will show you some tips about the enemy.
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Update: So If you die you have the death recap, you can click on enemy champions and see some tips. The same as the champion screens i think. And then you can hover over some of the skills that did damage to you and get some info about them. But thats all tho.
Best Answer
Malzahar is a perfectly acceptable AP carry. He has strong burst, good damage scaling and good teamfight presence.
There are a few reasons why you see him less in tournaments:
A) believe it or not, people got bored of him. Malzahar was a high level pick/ban for a long time, and after his nerf on W, people found different champions to use despite him still being viable
B) QSS can REALLY hurt his ability to fully combo high priority targets
C) No escapes. He's extremely susceptible to ganks. Most picked AP carries nowadays are a little harder to tag down. Think of Kennen, Ahri, Ryze, Morg etc. They all have good ways to ward off ganks. Malz does not
Don't let this sway you from playing and mastering him if you love his playstyle. He's still an extremely potent champion