Hi yall,

I recently started playing Malphite,love the big guy, and i'd like to get some ideas from more experienced players and those who have an insight it the game's mechanics concerning quintessences. I've used flat health and movement speed (tier 3) qe runes, but now i am in a need of a 3rd rune and really can't decide what's more adequate, should i get more flat health, or armor instead, or maybe even another movement speed rune? I've tried to figure out the exact mechs concerning armor but math has never been my strong side. I tank and stack armor heavily with my items, my build mostly looks like this

Ninja Tabi
Frozen Heart
Banshee's Veil
Guardian Angel
Thornmail/
Atma's Impaler/Warmog's/etc depending on the game

All suggestions are welcome
Thank you

I use my caster page to help Q and R skills since I typically stack armor items for E and go W last with maybe a last whisper to romp turrets during a final push.

red: magic pen
yellow: flat HP
blue: magic pen
quints: flat HP

meki pendant +2 hp pots into philosopher stone before boots.

item build from there.

well i do switch to merc threads if the other team has a lot of disablers, i always get items according to the opposition.

Are the red magic penetration runes primary or secondary?
I've always seen runes as important only for the strong early game, this is why i got flat health for yellow, flat mana for blue and crit for red,it worked well with both taric and rammus.However with Malphite i feel like magic penetration would make sense to put even more hurt with Q early game,but i never place more than 1 lvl on it,its great until lvl 4-5,after that i just use it as a slow and max E and W.
As far as mana regen,well i've never had any real problems with it,pots usually take care of that. With Banshee and Frozen Heart mana is never in short supply.
Thank you for the insight, its much appreciated...