Namasakaram Vikram Swami,
Your statement “So it is the soul’s wish which takes important priority.” Is confirmed in Bhagavad Gita 8.6
yaṁ yaṁ vāpi smaran bhāvaṁ
tyajaty ante kalevaram
taṁ tam evaiti kaunteya
sadā tad-bhāva-bhāvitaḥ
Also to your question, “At what point Karma gets nullified after death & soul travels towards Moksham?” Lord Sri Krishna answers in Gita 8.10
prayāṇa-kāle manasācalena
bhaktyā yukto yoga-balena caiva
bhruvor madhye prāṇam āveśya samyak
sa taṁ paraṁ puruṣam upaiti divyam
However, to address the challenges in the above requirements, Sri BhuVaraha Perumal said:
Sthite manasi susvasthe shareere sati yo narahaa l
Dhaatu-saamye sthite smartaa Vishwaroopam ca Maamajam ll
Tatas-tam mriyamaaNam tu kaashtta paashaaNa sannibham l
Aham smaraami madbhaktam nayaami paramaam gatim ll
Lord Varaha addresses Mother Earth or Bhoodevi (who expresses concern for the well-being of all Her children): If anyone thinks of Me, when the mind is sound (sthite manasi),with the body in good health (suswasthe shareere), and with all mental and physical faculties working perfectly and intact (dhaatusaamye sthite) – thinks that I am indeed the very cause of this universe (or the form of this universe, vishwaroopam), that I am without birth (ajam) – then I assure (You, Devi) that I will remember this devotee of Mine when he/she is on his/her deathbed, lying (helplessly) like a stone or a log of wood, and personally take him/her to the Supreme Abode.
As your know, this is also confirmed by Sri Deva Perumaal through his 6 words to Thirukachi Nambigal as a response to Udayavar’s concern.
- antima smruthi varjanam- Last remembrance of the Lord on the death bed is NOT necessary.
Hope this helps.
adiyen,
Ramanuja Dasan!