I would like to share this video with you. It may help you with killing Crota with 2 swords only without using a titan bubble.
https://www.youtube.com/watch?v=EuW8emTu1no
English
#Destiny
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A friend and I two man that and I 2 sword it on all 3 characters. Put your armour back to 32 and then do a video ;)