If you're getting to increase one of them without side effects, use the horse sheath. It can be changed back, and grows your cock in the same increments allowing for easy growth.
If you want to beat him though, wear gear with high burn resistance. You can get about 140% in that area which will take his damage down to about two per hit.
Personally, I think waiting should allow you to recover a few points of health or energy, that way it can be used strategically instead of just standing there. Sure there are ways but those are one time uses. If you were fighting a boss and you're low on energy and need that little extra for a...
I've beat him 7 times already. Just a bit of RNG with his charge which, if he whiffs, will stun him and make any damage done to him get increased by 500% I think. Stunning with a weapon itself won't give you the buff though.
I kinda see what he's getting at here. Most of the popular female characters in TITS usually have dicks and two can even be given dicks, so it can kind of suck when you when find a nice girl and she has one. But the way he worded his argument kind went off a bit.
I think it would be good if this item went towards hyper muscle. With so many ways to increase regular muscle now, this would just be redundant if it also boosted regular muscle.
I was either on E621 and found a piece that was tagged with Trials in Tainted Space or looking for good text adventure games. It's all a little hazy to me.