Who FBO and MRT suggestions?

The following usage is very cumbersome ...
I do not know how to optimize ...

ofFbo::Settings s;
s.width         = img.getWidth();
s.height            = img.getHeight();
s.internalformat    = GL_LUMINANCE;
s.numColorbuffers   = 7; 
baseMaskFbo.allocate(s);    
//////////////////////////////////////////////////////////////////////////
//MASK
//////////////////////////////////////////////////////////////////////////
baseMaskFbo.begin();

//Base
baseMaskShader.begin();
baseMaskShader.setUniform1f("blackBase",blackBase);
baseMaskShader.setUniform1f("whiteBase",whiteBase);
baseMaskShader.setUniform1f("strengthBaseMask",strengthBaseMask);
img.draw(0,0);
baseMaskShader.end();

//BLURX
blurXShader.begin();
glDrawBuffer(GL_COLOR_ATTACHMENT1_EXT); // write to this texture
ofClear(0, 0, 0, 0);
//ofSetColor(ofColor::white);
blurXShader.setUniform1i("radius", blurRadiusBaseMask);
baseMaskFbo.getTextureReference(0).draw(0, 0);
blurXShader.end();

//BLURY
blurYShader.begin();
glDrawBuffer(GL_COLOR_ATTACHMENT2_EXT); // write to this texture
ofClear(0, 0, 0, 0);
//ofSetColor(ofColor::white);
blurYShader.setUniform1i("radius", blurRadiusBaseMask);
baseMaskFbo.getTextureReference(1).draw(0, 0);
blurYShader.end();

//DILATEX
dilateXShader.begin();
glDrawBuffer(GL_COLOR_ATTACHMENT3_EXT); // write to this texture
ofClear(0, 0, 0, 0);
//ofSetColor(ofColor::white);
dilateXShader.setUniform1i("radius", dilateRadiusBaseMask);
baseMaskFbo.getTextureReference(2).draw(0, 0);
dilateXShader.end();

//DILATEY
dilateYShader.begin();
glDrawBuffer(GL_COLOR_ATTACHMENT4_EXT); // write to this texture
ofClear(0, 0, 0, 0);
//ofSetColor(ofColor::white);
dilateYShader.setUniform1i("radius", dilateRadiusBaseMask);
baseMaskFbo.getTextureReference(3).draw(0, 0);
dilateYShader.end();

//DILATEX
erodeXShader.begin();
glDrawBuffer(GL_COLOR_ATTACHMENT5_EXT); // write to this texture
ofClear(0, 0, 0, 0);
//ofSetColor(ofColor::white);
erodeXShader.setUniform1i("radius", erodeRadiusBaseMask);
baseMaskFbo.getTextureReference(4).draw(0, 0);
erodeXShader.end();

//DILATEY
erodeYShader.begin();
glDrawBuffer(GL_COLOR_ATTACHMENT6_EXT); // write to this texture
ofClear(0, 0, 0, 0);
//ofSetColor(ofColor::white);
erodeYShader.setUniform1i("radius", erodeRadiusBaseMask);
baseMaskFbo.getTextureReference(5).draw(0, 0);
erodeYShader.end();

baseMaskFbo.end();


baseMaskFbo.getTextureReference(0).draw(0,0);  //Base
baseMaskFbo.getTextureReference(2).draw(0,0); //Blur
baseMaskFbo.getTextureReference(4).draw(0,0); //Dilate
baseMaskFbo.getTextureReference(6).draw(0,0); //Erode

Start by tracing the ofFbo::Settings allocation and the baseMaskFbo sequence using glDrawBuffer and getTextureReference in the provided example. The issue asks for usage or optimization guidance but names no target files, tests, or acceptance criteria, so the definition of done needs clarification.