First off, this is my first build. I wont have any pictures on this one but they will come with updates. OT AD Malph can be a very powerful build if played right. Basic mechanics you are constantly spamming spells which will proc you Trinity, plus your w gives you a major ad boost with out much need for damage items. I have done some experimenting and this build seems to suit the idea.

Pros:
Tremendous burst damage increased greatly with Sheen/Trinity
Your are as deadly as you are tanky. Take advantage of this.
Malphite is just a blast no matter what build you play.

Cons:
You do lose SOME tankiness.
Getting down the rythm to use Sheen/Trinity to its fullest takes practice

IMO, runes are really a preference over a specific set. The runes shown are what I prefer to use and find the most useful to me.

Using this build you will be short on mana. This may propose a problem for spell heavy players. Counter this in your runes. That being said, your Q+E combo is an exceptional harass. The damage it drops is just outstanding but don't get to carried away or you will find yourself out of mana.

TOP LANE:
Top lane will be the biggest challenge for this build. You have to rely on harassing from a distance on most champs until your get built up enough to actually lock in with the champ.
If it is a attack speed based champ you should have no problem just land an E and have a field day with them. Heavy AD champs really don't pose a real threat(with the exception of Darius, no one likes him ;.;) but its still best to harass with Q+E before engaging in combat with them. Against another AP champ you will heavily depend on you harass to get them low enough to do a final burst(R+E+Q, W before you engage).

BOTTOM LANE:
Bottom lane is typically pretty easy depending on who you are matched with. Remember you are not an ADC! You do not want to lane with a support, you are the support! Low level just harass with Q+E combo and possibly pull a few kills off of it. Once you get level 6, if you have been doing decent in lane you should really pull some kills out now for your ADC. Focus on trying to pull the threat from the champs and allow you ADC to free farm or harass. This means you may have to dance at the melee creep line just to piss them off enough to do so. Lol

JUNGLE:
Possibly one of the easiest jungles with a decent run time. Grab blue first and work you way through jungle to red. If your top/bottom lane is free, let them have red! Your Q will ensure your enemy is almost always slowed on ganks. Plus with top having red they will more than likely hold their lane fairly well. When you gank make sure you can open up with your Q on whoever you want focused down and keep your burst around them. Once level 6 and you have your ult, you may be ready to just drop the bomb on some innocent squishy on bottom lane. BUT DONT! Save your ult for if they are escaping, to save your teammates lives or as an initiation for a team fight. Try to never gank with your R until you have a glacial shroud. Once you have your CDs down you can use it a little more freely but be mindful. You may regret using it for one kill when you miss out on 3.

In summary yes I know my guide needs a lot of work but this is pretty much just a rough draft. Any thoughts and comments are much appreciated! =D