beershoes. He didn't cut from 190 over the period of his camp. What he was saying was that he used to walk around at 190 (he competed on TUF at 185.)
He then started cutting to fight at 170. For this latest fight he weighte 172 on the day of the fight.
A fighter at the top level in the UFC is normally cutting about 1 weight category from their walking weight.
This is one of the reasons that some of the Pride guys haven't done as well as expected in the UFC. They are basically fighting a weight class up.
Fighters in pride didn't typically cut much for their fights, the foreign fighters were worried about the combo of travel and cutting. The Japanese fighters just historically have not been into cutting weight.
It is also why you will get guys that are tearing it up in smaller promotions then get steamrollered in their first UFC fight. They were used to cutting maybe 5lb for their other fights, now they are in against someone who weighs 15lb more than them.
Based on your stats you should be able to make 155 no problems with a decent camp. One thing that is important though is to do the cut properly and to have a couple of trial goes before the fight.