You can get a 700 trinket (there's one per main stat) from the nethershard (pre-patch event currency) vendors in the demon invasion zones.
700 weapons and armour come in strongboxes you get from participating in the events. The nethershard vendors sell an upgrade token to upgrade one of these weapons to 725.
700 jewellery comes from the nethershard vendors too.
The events don't work reliably on the ptr so it's hard to tell how farmable all this is.