Given a reasonable amount (eg 20MB) of RAM, a IIci will run OS 7.6.1 gladly and gracefully. However, given that you have System 7.5 already, you can update that to 7.5.3 with a free update from Apple (or download 7.5.3 as a standalone upgrade). If you mean, "Does it need also the sacrifice of a dove, or maybe an ox?" the answer is 'No'. Have you not installed from floppy disk before now? System 7.5.3 as an Upgrade arrives as a 19-part disk image, which you place on your IIci's desktop within one folder, and activate by clicking on Part 1. The System does the rest, given that at least 7.0.1 is already present. There is a text file at the Apple site to guide you.
Given that you have a 'system cable' (DB-25M to CN-50M) to connect your terminated external CD-ROM drive to the IIci, there should be no problem of recognition. If a CD contains a valid System Folder (ie, it is a bootable CD), you should be able to start up with the c key held down until Happy Mac appears, and take it from there.
8 x 1MB is the least amount of RAM to make the game worth the candle. More is better, especially if you are not using a video card with its own VRAM.
de