The fact that Prohormones were legal back in the days does not mean that they are harmless and completely safe. Steroids are also completely legal in many countries, which does not mean that they do not have their adverse side effects and that they should be taken with precautions. Prohormones to have many side effects, and they are usually very liver toxic. Therefore, you need to use a good liver supporting supplement with your PH, especially if there is liver discomfort. If you are already feeling it without the need for bloodwork, the situation is not looking pretty.
I would not use prohormones, since it is completely pointless these days. Back in the days prohormones had one advantage, and only one - they were legal to buy and use. However, they cause the same side effects as steroids do, and they are even more liver toxic. Yet, the results they provide are not as prominent as those you can get with steroids. Therefore, if you are ready to take on those side effects, it makes much more sense to go with steroids, which will give more results. If you want something legal to use, and safer in terms of side effects, SARMS are a much better alternative - they are legal to buy and use, and they will barely cause any side effects at all. They may not be as potent as steroids are, but this is the price you pay for not having to deal with so many side effects.
Therefore, it is best to choose betwee steroids, with prominent results and considerable side effects, or SARMS, with milder effects, but no undesired effects.