The best for Greece. Any well informed person will acknowledge that the IMF's role is to enslave any country financially. Its conditionalities speak for themselves.
To believe that the IMF is a relevant financial institution is to deny the reality, is to deny the shift the world is experiencing, from unipolar to multipolar. Its hegemony is outdated.
Any economy that needs finance has a choice now. China brings competition in a monopolized niche. The American hegemony in matter of financial slavery is over.
Greece appears to be in a predicament. It is indebted (IMF's goal) because of conscious bad investments perpetrated by its elite. The Troika counting the IMF, and among its main players Germany are pushing Greece to pay or to require more loans. In the first solution, the Greek government had to steal money from its people's pension funds to bailout the oligarchs' conscious TOXIC investments. They steal from the poor to give to the rich. If A, B, C make a conscious bad investment, they assume the consequences. Nowadays paradigm favors the rich for that matter.
The second solution is to dig a deeper hole indebtedness. Are they solutions or the death of a nation.
If I were Greece, I would default, reinforce a partnership with Russia to solidify the gas pipeline project. I would, hence, allow an immediate cash flow in the Greek empty coffers. I would shut doors of any enemy embassies meaning embassies that would intend to attempt to destabilize the fragile intention to recovery. I would protect any borders limitroph with NATO's members and deploy maritime defense ships. I would also have my allies take satellite pictures of any move around my country.
The outcome is freedom and sovereignty.