Ohmwrecker rework, concepts inside
ohmwrecker as is.... is pretty weak, thats due to the powerbudget of 2650. although well over saturated in stat value and itemization for tanks.... it just doesn't offer enough to justify a whole item slot in someones build.
right now its a useless gimick, disabling someones turret for 3seconds to towerdive, its not desirable when you can take raw combat stats and do that same job anyway.
if you want to enable killing the enemy under the turret it should have a slow active or some type of punishment against the enemy champion rather than the turret action.
#my recommendation to fixing ohmwrecker is bump up its cost, add in another ruby crystal or giants belt and ramp up that total health to 650. in addition change the active to redirect enemy turret shots to yourself and take reduced damage from turrets for X amount of seconds scales with level until you leave turret range, or it dies.
what this would do is offer health scaling tanks the capacity to towerdive and not be afraid to get in there for the team. while adding just health it empowers health scaling champions such as sejuani, zac, naut, shen.
put it this way. what good is having a shen in the top lane for instance, who cant take turret shots until he has 2 items? or if he does decide to take turret shots its only going to be a couple before their target is already dead to your damage jungler.
is there even a consideration these days whether take something over sunfire or spirit visage first?
so more health won't make the items more usable . and making the cost higher will make this items worst then now cuz most of the time you will buy the items in late game if it's cost is bump up ....
but i think that adding the item a new passive will make it a batter item over all (a passive that no other item have like heal 20 hp over 5 seconds for every basic attack you hit on an enemy champion stacks up to 5 times etc...)