If you need exotic shards in Destiny 1, you can easily farm them in bulk with only the small cost of motes of Light and Glimmer.
1) Consume a heavy telemetry (can buy from the Gunsmith)
2) Go to the Exotic Weapon kiosk, and purchase a heavy weapon.
It will cost one exotic shard and 2,500 glimmer
3) Equip the heavy weapon, as well as any weapons and armor you want to level up
4) Consume 6??? Motes of light. That will completely unlock all the perk circles of the weapon. DONT put any resources into the perk circles AKA dont click them.
5) Dismantle the weapon. This will give back:
- TWO exotic shards
- 250 to 300 glimmer
- 5 to 10 weapon parts
Use the two exotic shards to buy two more heavy weapons, and repeat the process. Keep an eye on all your other weapon and armor slots and keep items equipped that you want to level up.
Watch my exotic shard farming video here