I have this configuration 

"CKEDITOR.config.disableObjectResizing = true; // disable resizing of images, for example
CKEDITOR.config.linkShowAdvancedTab = false; //Remove link dialog advanced tab
CKEDITOR.config.linkShowTargetTab = false; //Remove link dialog target tab
CKEDITOR.config.autoParagraph = false;
CKEDITOR.config.enterMode = CKEDITOR.ENTER_BR;
CKEDITOR.config.shiftEnterMode = CKEDITOR.ENTER_P;
CKEDITOR.config.height = '400px';
CKEDITOR.config.font_defaultLabel = 'Arial';
CKEDITOR.config.fontSize_defaultLabel = '12';
CKEDITOR.config.resize_enabled = false;
CKEDITOR.config.disableNativeSpellChecker = false;
CKEDITOR.config.entities = false;
CKEDITOR.config.removePlugins = 'elementspath,liststyle,tabletools,scayt,menubutton,contextmenu';"
And the setup :

"
        toolbar :
        [
            { name: 'styles', items : [ 'Styles','Format','Font','FontSize' ] },
            { name: 'links', items : [ 'Link','Unlink' ] },
            { name: 'basicstyles', items : [ 'Bold','Italic','Underline','Strike','Subscript','Superscript',
                '-','RemoveFormat' ] },
                '/',
            { name: 'insert', items: [ 'Image', 'Table', 'SpecialChar'] },    
           
    
            { name: 'paragraph', items : [ 'NumberedList','BulletedList','-','Outdent','Indent','-','Blockquote',
                '-','JustifyLeft','JustifyCenter','JustifyRight','JustifyBlock','-','BidiLtr','BidiRtl' ] },
            { name: 'colors', items : [ 'TextColor','BGColor' ] },
            { name: 'clipboard', items : [ 'Cut','Copy','Paste','PasteText','PasteFromWord','-','Undo','Redo' ] }             
        ]
"