CM 14.2.3.0 java version and IE 11 settings

We are having difficulty locating the tested version of Java for CM 14.2.3.0 build 2550. The last tested configs document skips from 14.2.2. to 14.2.5 each version that is listed has a different version of java. We are having a number of issues with display - workspace not loading or loading extremely slowly, popup window for checking documents back in won't expand large enough to get to the buttons, project tree jumping around to other projects when closing out of one module area in a project, button click actions (save, open, etc.) take so long that when clicked again the