OK, here are calculations:
For JA claim only
Gross income for Jobseekers (gross minus PRSI/pensions) = 709.23
60 Euro disregard, & Balance Assessed at 60%
Assessed income = 389.53
Family Rate JA = 402.20
Difference = 12.67
So, you would get 12.67 per week if apply only for Jobseekers Allowance
If your other half applied for FIS, and you apply for Jobseekers, then calculation is as follows:
Assessed Income for Jobseekers as above = 389.53
Assessment is halved because wife on FIS = 194.76
Family rate for Jobseekers (without wife on claim, and 1/2 rate for children) = 232.70
Minus Assessed income of 194.76 = 37.94
Income for FIS (net income) = 648.14
Plus JObseekers of 37.94, gives family income of = 686.80
FIS Income limit with 3 children = 703
Difference of 16.92
Paid 60% of difference = 10.15
Because this is less than 20 Euro minimum payment is 20.00 Euro
So, you would get JA payment of 37.94, and she would get FIS payment of 20.00
There is another permeatation of this that i'd like to consider that might result in more of a payment, but i'm in a rush, i'll think about it and post on it tomorrow.