Weblogic upgrade ideas

Hi,

We are planning to migrate our two node weblogic cluster to Solaris sparc servers and need to decide whether 

need to go for 10.3.5+ or weblogic 12c.We have applications of both forms/reports and adf.

Our current environment is as follows:

OS: AIX 5.3

Weblogic server: 10.3.3

Oracle forms/reports: 11.1.1.3

Oracle Internet directory: 10.1.4.3

Oracle adf

Also need to know whether its good idea to use jrocket instead of existing JDK.

In summary we need expert ideas on;

1. whether we should go for 10.3.5+ or 12c

2. Is it ok to go for jrocket instead of JDK

3. Whats the impact on OID

4. Whats the effort for application side.