brim for warping ABS

Very often I use slic3r for my projects. If I need a brim under my prints, slic3r makes it in parallel to the outline of the object. If the object warps and its corners will lift up from printbed while printing, this kind of brim breaks and so it is useless. So I have made a lot of rectangles X,Y differs and Z=0.15mm. I print this first, then the object
On difficult materials I use this printbed (bottom to top):
heated bed
glass for flatness
sheet of iron to support magnets
paint