Assume Table T1 has data, and you want to move to T2.
Here is what I will do:

Disable all indexes or drop.

alter table t2 nologging ;

alter session force parallel dml parallel 6;

alter session force parallel query parallel 6;

insert /*+ append */ into t2 NOLOGGING select * from t1;

commit;

alter table t2 logging;

Create/Rebuild all indexes.