Exporting from Oracle enterprise edition to standard edition reaches schemas limit

So, I'm trying to export an oracle database(10.2) from EE to SE over a networklink.
It all works fine except that I'm hitting a limit. The database has 1335 schemas and it seems that I can't transfers these in one go. Not with the schemas parameter at least.
Currently I'm doing a full=n with schemas=(the schemas to export) as I'm not really sure what a full=y exclude=schemas:() will transfer. Seeing that I want a clean database.

I tried using cmdline impdp and a par file. But got the same error in both:

When trying 1000 schemas: 
ORA-39001: invalid argument value 
ORA-39071: Value for SCHEMAS is badly formed.

When trying 250: 
ORA-39006: internal error 
ORA-39065: unexpected master process exception in DISPATCH 
ORA-06502: PL/SQL: numeric or value error: character string buffer too small

ORA-39097: Data Pump job encountered unexpected error -6502

And when using 25 schemas it works fine.

The syntax is exactly the same, being built dynamicly.
As we can see it appears that the SCHEMAS variable has a length wich oracle can't handle.

Has anyone of you tried the same thing? Would you recommend going the easy way with full=y? Are you confident it doesn't transfer EE history or data.

Update:
An example of EE data imported when using the full=y on SE

Processing object type DATABASE_EXPORT/SYSTEM_PROCOBJACT/POST_SYSTEM_ACTIONS/PROCACT_SYSTEM
ORA-39083: Object type PROCACT_SYSTEM failed to create with error:
ORA-00001: unique constraint (SYS.WRI$_ALERT_THRESHOLD_PK) violated
Failing sql is:
BEGIN
dbms_server_alert.set_threshold(9000,dbms_server_alert.operator_GE,'85',dbms_server_alert.operator_GE,'97',1,1,NULL,dbms_server_alert.object_type_TABLESPACE,'');COMMIT; END;

Which is AWR which is an enterprise feature.

Another is

ORA-29357: object AUTO_TASK_CONSUMER_GROUP already exists
Failing sql is:
BEGIN
dbms_resource_manager.create_consumer_group('AUTO_TASK_CONSUMER_GROUP','System maintenance task consumer group','ROUND-ROBIN');COMMIT; END;

which I believe is the resource manager and in it's turn enterprise feature.