Riven statistics for Sortie and Archon's Hunt rewards

892 rewards.

Official droptables on Warframe.com

Reward type	Count	Percentage
Anasa Ayatan Sculpture	244	27.4%
Riven Mod	253	28.4%
Endo	100	11.2%
Kuva	104	11.7%
Booster	101	11.3%
Exilus Warframe Adapter	25	2.8%
Forma	23	2.6%
Orokin Catalyst blueprint	23	2.6%
Orokin Reactor blueprint	17	1.9%
Legendary Core	2	0.2%

Statistics for Netracell mission rewards

147 rewards.

Official droptables on Warframe.com

Reward type	Count	Percentage
Crimson Archon Shard	28	19.0%
Melee Crescendo	9	6.1%
Amber Archon Shard	32	21.8%
Melee Duplicate	14	9.5%
Azure Archon Shard	33	22.4%
Melee Arcane Adapter	31	21.1%