Elden Ring has an astonishing build diversity, allowing you to build the character of your dreams with a playstyle that is uniquely your own. If you fancy yourself as a Spell Spartan, casting powerful spells and taking on enemies with colossal blades, then Strength Intelligence is the way to go.
Elden Ring: Power Intelligence Builds Are Perfect For Level 150
While not the most common combination in Elden Ring (unlike Dex Arcane or Strength Faith), the Strength Intelligence build is fun in its own right. For your encounters in the Lands Between (and now the Shadow Realm), you'll have no shortage of weapons and magic to draw from.
With the Strength Intelligence build, you can do multiple variations. If you want to prioritize dealing damage through your Ash of Wars weapon, then Strength is your top priority. However, if you prefer a spellcaster playstyle, then your go-to stat is Intelligence.
For a level 150 character I would recommend the following stat distribution. This will allow you to cast almost all of the Elden Ring spells and give you enough power points to increase the damage of your armor.