Generally, always max up HP for tanks or slow attackers. Also modify the points a bit to get the HP to an odd number, this allows you to take hazards better.
Also if you want to play competitively, seeing as DParsee has high defenses on both, you'll want to see what your team needs. So either max up FoDef or SpDef. The rest could be dumped to the other defense.
For some puppets that have a very high defense on one but average on the other. better max out on the weaker ones so it can wall better. If it's too low, then better pump the high defense even further.
The first example is Defense Hecatia. It has sky high SpDef but middling FoDef, but since its FoDef is still average, you can max out FoDef and wall everything better.
Second example is Defense Yuuka. Very high FoDef but horrible SpDef. Even if invested, it won't take Spread attack very well, so might as well increase its FoDef. (But since this is DYuuka, it's better being a tank hitting things rather than walling since it has high FoAtk)
Hope this helps.