1. Was to the fact he wouldn't have to come off, any water retention from 2iu shouldn't be enough to negatively effect him. Unless op is in the running for adult black belt world's podium placement which I doubt, he's not being tested and the ibjjf most likely isn't investing in testing for hgh.
2. EQ would be being used for the enhanced erythropoiesis, which the benefits sought would be seen at a higher dosage. Bjj guys run cycles coming into competition, off season maybe but that will be for muscle gain if they want to recomp or jump divisions. No one said using a bodybuilders trt wouldn't yield benefits.
3. Low dose orals work no one debated that. The issue is the trade off and how his body reacts. He will for sure get narly pumps in hard training and his body may not handle the toxicity well. The thing to remember is this is an average guy not a genetically elite athlete competing for olympic gold. People at that level will push the boundaries. I train bjj to 30mg of var real and bjj is painful.
To add, if you want to work on compounding you'd go, test base, primo for erythropoiesis, muscle and e2 control, deca for joint support, hgh for recovery benefits and lipolysis. All can be taken together at combined amount well under a gram a week and see great benefits in performance and body composition.