Something like Blue Gene, stoked or sustain alpha would be great. They have AI properties (which work differently than a SERM), and they boost test. Blue Gene is an anabolic optimizer, which unlike other test boosters or "estrogen killers", it BALANCES hormone levels, by gentley reducing estrogen and optimizing test levels. Ive used Blue Gene during a few Epi PCTs with great results.
I will also say while Nolva is enough, something like Blue Gene will produce feelings of well being, natural energy and test optimization which is vital to keeping your energy levels up and feeling good...when coming off Epi/havoc theres psychological issues which ppl dont talk about much. But when you go from 500% to normal, it can mess with your mind.
Thats why i advocate something more than nolva, so you get your test levels up asap.