I would start with the standard dose of aromasin at 12.5mg EOD on that stack. You will have to keep up with your bloods and see if you need to adjust from there.
A lot of times it comes down to expectations. You will have guys run a SARMs stack and gain 5 pounds and be super excited. At the same time, you will have guys run the same SARMs stack and be upset that they "only" gained 5 pounds, lol.
The taste and colour really come down to the other things in the bottle besides the active ingredient. No need to worry about it. Umbrella is the best!