There's very little value in taking it if you've already gotten As in Micro I and II, and also have complex analysis. Math grades (and specifically, real analysis, and other higher level math courses) are used to proxy your ability to handle first year coursework. The only potential cause of concern is that your school is unranked, so adcoms might be a bit skeptical of the rigour of the PhD courses you've taken. However, with regards to that, there really isn't much you can do about it. The best thing to do would be to see where past students from your school have gone on to do their PhDs, to kind of gauge the general perception of your school.
As for charting your way forward for your senior year, it'll really help if you post your complete profile here, using the typical format, to better inform others on this forum of the full picture.