Need advise for tuning Oracle redo log files settings in 11.2.0.4 database.

Hi:  we run a few times Volume Tests and  get STATSPACK report.  Each time wait events from 'log files' keep surfacing to 'top 5 wait events'.  I understand there are always 'top 5 wait events' but really want to tune redo log settings.  our system is congested on 'redo logs' .

here is our DB settings for 'redo logs' get at normal office hour:

SQL> SELECT BLOCKSIZE FROM V$LOG;

BLOCKSIZE
----------
       512

SQL> SELECT name, value FROM v$sysstat WHERE name = 'redo wastage';

NAME                                                                  VALUE
---------------------------------------------------------------- ----------
redo wastage                                                      171462448

SQL> select * from v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES  BLOCKSIZE    MEMBERS ARC
---------- ---------- ---------- ---------- ---------- ---------- ---