What if we changed Mordekaiser into a Tank?
Change his passive to be at a standard fixed rate of 25 (+10% of max health) and no longer gives a 25% of shield left over and takes more time to go down, then change up some of Morde's abilities. (Mordekaiser's shield stays as is for 4 seconds, if no ability damage is given, shield decreases by 1 per second.
Mordekaiser's Q will now give Mordekasier 25% of his shield for each hit.
Mordekaiser's W will gain back its original look, and now deals damage without the need for being touched and instead of a heal, it gives Mordekaiser up to 25% of his shield (and an extra 25% from an ally) if he (and the ally) deal damage to enemies.
Mordekaiser's E will now instead of giving the most shield, give only 6/7/8/9/10% shield per enemy hit, and increases his shield value by 1 if it kills a minion or hits a champion and by 2 if it kills an enemy champion.
No changes to his R.