Tweetshouldnt have much of a prob with either. both are very mild on the liver and for all those but a few who are sensitive they are usually easy on the hair. alot of guys will tell you to do test with them. while i think you would get more out of the cycle if you did. it isnt neccesary
i have done oral only cycles with great success. var or tbol would be my choices. never used primo. small gains but what you get are lean muscle quality gains.
you will need an anti E (serm) for PCT either nolva or clomid will do. no need for them during.
good luck