PSA: Get scaling MR blues, flat armor yellows

Let's do some math, taking Annie for example. If you take flat MR runes, you will have 42 magic resist for a 29.6% magic damage reduction.

How about scaling? At level 1: 32 MR for 24.2% damage reduction At level 6: 39 MR for 28.2% damage reduction At level 11: 47 MR for 32.0% damage reduction At level 18: 57 MR for 36.3% damage reduction

That means that for three quarters of the game (since 1-6 takes like 8 minutes), you will have more MR than you would have with flat MR. Scaling MR is especially useful against burst mages/AP assassins, most of which don't really get scary until 6 anyway.

Why not get scaling armor runes then? Since flat armor seals only give +1 armor instead of 1.34, scaling armor should be better than scaling MR, right? Wrong. Every champion in the game (minus thresh) gets armor as they level up, and resistances are less valuable the more you get of it.

Let's take Annie once again: ---------------------flat armor------------------------------------scaling armor--------------------- At Level 1 - 22.6% damage reduction vs 17.2% damage reduction At Level 6 - 32.5% damage reduction vs 32.6% damage reduction At Level 11 - 40.6% damage reduction vs 43.2% damage reduction At Level 18 - 49.0% damage reduction vs 53.3% damage reduction

Despite flat MR runes being better than flat armor runes, scaling armor only gives 4% extra damage reduction at level 18, compared to the 6% scaling MR gives at 18. Scaling armor runes just aren't as good because of the armor per level bonus most champions have by default.