Use of Analytical Funtions and Keep clause - sql

Question

I have a lenghtly query that can be shorten with the correct functionally (I beleive). Can we use existing functions such as Max Min Keep to make this query more efficient? My entire query is posted below.
For example: Can we remove the CTEs and use analytical functions such as max and min This would also elimate ranks and several joins
SQL:
WITH LAST_VALUE_BEFORE_START_DT AS (
SELECT DISTINCT * FROM(
SELECT
P.CL_ID,
HISTORYID,
H.MENT_DT,
H.ROLE AS MAX_ROLE,
H.PM_ID AS MAX_P_ID,
DENSE_RANK() OVER (PARTITION BY P.CL_ID ORDER BY H.MENT_DT DESC )AS RNK
FROM MANAGER_HISTORY H
INNER JOIN CP CCP ON H.CLIID = CCP.CLIID
INNER JOIN PROGRAM CP ON PROGRAMID = CP.PROGRAMID
WHERE 1=1
AND CP.TYPEID IN (13,200,11001)
AND H.ROLE = 'RED'
AND H.MENT_DT < START_DT
--AND P.CL_ID = 920917
)LAST_VALUE_BEFORE_START_DT_RNK
WHERE 1=1
AND RNK =1
)
,MIN_VALUE_BETWEEN_PROGRAM AS (
SELECT * FROM(
SELECT DISTINCT
P.CL_ID,
HISTORYID,
TRUNC(H.MENT_DT) AS MENT_DT,
H.ROLE AS MIN_ROLE,
H.PM_ID AS MIN_PM_ID,
DENSE_RANK() OVER (PARTITION BY P.CL_ID ORDER BY H.MENT_DT)AS RNK
FROM MANAGER_HISTORY H
INNER JOIN CP CCP ON H.CLIID = CCP.CLIID
INNER JOIN PROGRAM CP ON PROGRAMID = CP.PROGRAMID
WHERE 1=1
AND CP.TYPEID IN (13,200,11001)
AND H.ROLE = 'RED'
AND H.PM_ID IS NOT NULL
AND TRUNC(H.MENT_DT) BETWEEN TRUNC(START_DT) AND NVL(END_DT,SYSDATE)
--AND P.CL_ID = 920917
) MIN_VALUE_BETWEEN_PROGRAM_RNK
WHERE 1=1
AND RNK =1
)
SELECT * FROM (
SELECT
X.*,
DENSE_RANK() OVER (PARTITION BY CL_ID ORDER BY FIRST_ASSGN_DT,MENT_DT ) AS RNK
FROM(
SELECT DISTINCT
C.CL_ID,
P.CL_ID,
CP.PROGRAM,
START_DT,
END_DT,
H.ROLE,
H.MENT_DT,
H.PM_ID,
LVBS.MAX_ROLE,
LVBS.MAX_P_ID,
MVBP.MIN_ROLE,
MVBP.MIN_PM_ID
,CASE
WHEN H.MENT_DT < START_DT AND LVBS.MAX_ROLE = 'RED' AND LVBS.MAX_P_ID IS NOT NULL THEN TRUNC(START_DT)
WHEN H.MENT_DT BETWEEN START_DT AND NVL(END_DT,SYSDATE) AND H.ROLE = 'RED' AND H.PM_ID IS NOT NULL
THEN MVBP.MENT_DT
ELSE NULL --TESTING PURPOSES
END FIRST_ASSGN_DT
FROM MANAGER_HISTORY H
INNER JOIN CP CCP ON H.CLIID = CCP.CLIID
INNER JOIN CLIENT C ON CCP.CLIID = C.CLIID
INNER JOIN PROGRAM CP ON PROGRAMID = CP.PROGRAMID
LEFT JOIN LAST_VALUE_BEFORE_START_DT LVBS ON P.CL_ID = LVBS.CL_ID
LEFT JOIN MIN_VALUE_BETWEEN_PROGRAM MVBP ON P.CL_ID = MVBP.CL_ID
WHERE 1=1
AND CP.TYPEID IN (13,200,11001)
)X)Z
WHERE 1=1
AND Z.RNK = 1