It’s the efficient/sufficient argument with the twist that there IS an elect.
Unconditional election: yep, but through the absolute indivisibily of God’s power and knowledge.
Irresistible grace: yes, preveniently. nope, regeneratively.
I guess we are kinda' hijacking this thread but I don't really understand the contrast you are trying to make. I have been a committed Calvinist for barely under a year and have not weighed too deep into all of the sub-currents within the system.