give these two dual res items a slider to convert some resistances

You can't treat defense the same way as offense item wise particularly if you need it in lane vs a particular enemy. when you want dps it's simple just stack it. but when you want survivability some options are meh, at least if you want options and not be stuck having to only build the same things. Not only that tanks should be able to punish comps that are predominantly either AP or AD. after all its not like said comps do not have items they can turn to deal with tanks too.

slider on could convert 25 mr into 25 armor (vice versa). to have 30 mr and 80 armor and can convert say 17 mr to armor (vice versa)