It's a bit tricky not knowing your set-up and why you need a calling search space with over 100 entries for a route pattern but here's my solution to your problem.
Partition_1
partition_2
partition_3
partition_4
partition_link
Partition_5
Calling search spaces
CSS_calls - Partition_1
CSS_1 - Partition_2,partition_3,partition_4, Partition_link
CSS_2 - Partition_5
Translation Patterns
TP 22 - partition_1 - CSS_1
TP 22 - partition_link - Css_2
So if someone has a CSS_calls and calls 22, first it will look to find a match through all the partitions in CSS_1, then it will use the partition_link and find TP 22 in that partition and carry on in CSS_2
I realise it's a bit of a fudge but it does work.
Like I said I don't know your particular set-up so you'll need to experiment a bit.
Paul