There's no oral igf-1, mk677 is probably going to give the biggest IGF spike in pill form, but, it's not some muscle building powerhouse. There are no peptides that supress testosterone, but there's also not really any oral muscle building peptides either.
Natty supps give natty gains
Sarms, prohormones and gear in doses low enough to not supress give natty like gains and you still get some suppression.
I'm a firm believer that you got to either stay natural or jump in the pool. Sticking a toe in gives you the side effects without the results. Counter productive in my opinion.
SLU PP 332 might be of interest to you. I'm loving the combo of 2-3mg Methylene blue and 500-1000mcg of SLU. Cardio is up, reps are up, strength is normal, body composition is improving. Dare I say it might actually be exercise in a bottle..... With reasonable expectations I think this is going to beat any natty combo. It's not going to produce tren like results but it's definitely working well