Magic Resist, or magic resist per level Glyphs?

I will have to staunchly disagree with you there. The general rule of thumb is flat armor and scaling magic resist. You get flat armor because it helps you be a bit more beefy early game since almost all forms of damage are physical (minions, jungle creeps, basic attacks, many abilities). You get scaling magic resist (particularly if your not mid lane) because you will encounter little magic damage until mid game (which just so happens to kick off around level 9). Past that, they only become stronger as you move into late game.

[{quoted}](name=The AFK Farmer,realm=NA,application-id=WEuoGbmp,discussion-id=5XLrIYdo,comment-id=0000,timestamp=2015-01-21T07:40:50.355+0000)

In this case, you're probably better off with the flat stats, because the scaling ones won't catch up to the flat stats until level 9. Even for a solo laner, that's a large portion of the game to go with substandard MR.

The general rule is that if the flat runes are 3x less than the level 18 scalings (meaning they're the same worth at level 6), then it's recommended for solo laners to bring scaling runes. Bottom lane and jungle should always bring flat runes, because they take longer to hit 6.

Just want to say that the way people analyzing here have it all wrong. Not only is .17 scaling MR take precedent over flat 1.3 at level 8 (not 9), but if you're in a solo lane which hits level 6 really fast compared to jungle or duo lanes, then scaling stats are always better... Especially in the case of MR. Level 6 your MR from a single scaling MR glyph is 1.02 leaving a negligible .28 until the flat MR. The fact is, solo lane match ups should have SOME sort of scaling. Pros in the mid lane use Scaling HP deals AAAAAND scaling AP glyphs. Tops use Scaling armor AAAND scaling magic resistance. If you're in a duo lane or jungle the concept changes entirely. I will gladly attach a video of Phreak breaking down the information I've said more in-depth to prove that I'm not spewing bullshit out...

I only chose your post to reply to because it was one of the most sensible posts with some minor misinformation.

[{quoted}](name=Gym Leader Yaki,realm=NA,application-id=WEuoGbmp,discussion-id=5XLrIYdo,comment-id=0001,timestamp=2015-01-21T14:47:18.794+0000)

Flat magic resist = laning against AP Scaling magic resist = not laning against AP.

If you're the jungler, since you're not directly facing an opponent and since jungle monsters deal physical damage, scaling MR will be more important (you can build MR for baron later).

Here's the problem, when playing squishy champions like ADCs, getting flat magic resist will help you survive better and trade. I know that Leona seems like she does no damage, but since you're full squishy, the flat MR will help you more than you think. FURTHERMORE, don't think 27 MR late game will help an ADC in any way. ADCs can get 1-3 shot, getting those scaling will be mostly useless. You can also say the same for squishy top laners and many many more champions.

In my opinion, you should get both and use both runes like me, but if you're only going to purchase one set, get the flat MR.

Source : countless days of research and going over challenger/diamond rune pages.

Your TL;DR is incorrect but much of what you've said is pretty solid. Solo laners always should have some sort of scaling stat... Mid pros have scaling AP and scaling health, top laners tend to have scaling defensive stats like armor and magic resistance. The faster you get to level 6 - 8 the more you want to focus on scaling runes. FLAT MR = 1.3 SCALE = .17 per level

Level 6 Flat: 1.3 Level 6 scale: 1.02

Level 7 Flat: 1.3 Level 7 Scale: 1.19

Level 8 Flat: 1.3 Level 8 Scale: 1.36

The difference between a flat MR and scaling one at level 6 is a negligible amount of MR... Scaling is WAY better if you're in any situation where you will rapidly hit level 6.

Source: mathematics, Phreak's lesson plans for masteries and runes for season 5, and a solid understanding built from existing foundation that I've researched.