Mordekaiser: Probably one of the most annoying champions to deal with, solo lane is must so ask for mid or solo top. When laning try not to push to hard unless they have a hard push champion as well. If you can not help it and you are to far pushed, and if your jungler is busy ganking or covering a lane ask if you can tank double golems, you can take them as low as 3

Vman7 runes are probably the best atm unless you want some sort of cdr which isn't necessary

9/0/21 pretty basic movement speed helps and more cdr on your flash

I go this because you can always burst important hero down and still leave with all that spell vamp. Boots and 3 pots is probably the best choice to run, but if you're vs a hard to deal with ad champion top go armor 5 pots. Rush will of the anicients you can stay in lane and keep farming like a boss then get 1 more hextech rev for more spell vamp so you never die LOL. Sorc shoes ofc for more mpen, then a hat so you can get more damage. Now lich bane isn't necessary but i like it for more damage, then get a gunblade so you have triple brust with your ult gunblade ignite combo. Igniting isn't necessary most of the time but it gets the job done if they live. after you have gunblade make sure you always have a blue pot on you! Now you can go void or Zhonya's go hourglass if you need it after you burst a champion down or go void if you're stomping (which you should be)

Reason for maxing shield instead of Q is, cause with your Q you have to be in meele range so you can't always get it off. Now if you're pushing W pushs harder then Q, if you're teamfighting you can put it on your tank or someone who is an up an their face champion and does damage. Remember you always want to maximize your damage!

Morde is pretty decent right now. Most consider him op but i don't think so just annoying lol, But only go glass cannon morde if you have another tank that way you can shield him do damage and be a boss :D