I am of the understanding that if you take the medi-centre strategem you get a EXTRA 4+ save for models in the building.

Put necrons in there and a monolith just behind and you get:
your 3+ armour save
your 4+ medi-centre save
your 4+ will be back roll
and if this fails send them through the monolith on another 4+ and bring them straight back into the building therefor keeping the monolith out of sight but particle whipping stuff if it comes really close. Basically Necrons wont die.

My question is, is this funny and o.k or completely unsporting.
One thing i ask is try to imagine these saves applied to you favourite race, don't dispell it because you don't like necrons. thanks!