Nesting IF and ISBLANK

Please help. I'm trying to get the cell to return blank but I'm having trouble.

=IF(AND($I2>1,AG2>=0.5),1,IF(AND($I2<1,AG2<0.5),1,IF(AG2=""),"",0)) There's and error message when I include the last argument IF(AG2=""),"",0.

This alternative hasn't worked either =IF(ISBLANK(AG2),"",IF(AND($I2>1,AG2>=0.5),1,IF(AND($I2<1,AG2<0.5),1,0)))

I've also tried with using IFERROR to return blank rather than DIV/O which ruins my pivot table. Thanks so much