Well, how can I say no to your enthusiasm for Campione? I'll definitely give it a shot! Is the anime of that any good btw? I remember vaguely watching the first episode...like it is so vague it almost feels like it was just a dream.
For Mahouka, I first got into it from reading the manga. There was something that appealed very strongly to me for some reason, and I had a strong urge to read more! I know what you mean about the info-dumps though. I usually have to read through the magic lingo a few times before I only vaguely understand what they are talking about, though I found it to be a nice touch.
The Anime was utter crap, it barely followed the novels. In fact it had an original ending lol. My guess is the Anime actually deterred people from reading the LN, it really was that bad. I usually recommend people to just watch the first episode of Campione to get a background of where the MC gets his powers. The novels go in the following order, 3,11,1,2,4,5,6,7,9,10,12,13 with 8 being a side story volume. 3+11 serves as prequels before the series starts on Volume 1, by watching the first episode you can sort of skip 3+11 if you really wanted to. Volume 3 is pretty much episode 1, volume 11 is a continuation of volume 3 and expands on why he is with Erica Blandelli (if you jump to volume 1 you won't really know the extent of their relationship). I pretty much skipped volume 3 since it was very boring but volume 11 was pretty interesting (I FINALLY figured out what that "hot night" in Sicily was in volume 11). Basically I'd say, watch episode 1, read volume 11, then start from 1 and follow the order I previously describe.