I been toying around with a half elf scrolls master when I came across a loop hole to cast specific spells at more than double your CL . This is the build I would use
Lvl 5 half elf universalist scroll master
Must haves
Magic trait
Gifted Adept: Your interest in magic was inspired by witnessing a spell being cast in a particularly dramatic method, perhaps even one that affected you physically or spiritually. This early exposure to magic has made it easier for you to work similar magic on your own. Pick one spell when you choose this trait—from this point on, whenever you cast that spell, its effects manifest at +1 caster level. Ear piercing scream
Alternate racial trait half elf
Arcane Training: Half-elves occasionally seek tutoring to help them master the magic in their blood. Half-elves with this racial trait have only one favored class, and it must be an arcane spellcasting class. They can use spell trigger and spell completion items for their favored class as if one level higher (or as a 1st-level character if they have no levels in that class). This racial trait replaces the multitalented racial trait.
Feats
Lvl 1 spell focus evocation
Skill focus spellcraft (bonus )
Scribe scroll wizard bonus feat
Lvl 3
Spell specialization ear piercing scream
Lvl 5
Craft wand
Ok so at lvl 5 you can normally cast ear piercing scream at CL 5 + 1 trait bonus + 2 spell specialization so you can scribe a scroll of ear piercing scream at CL 8
Do this 4 times so u have 4 scrolls at CL 8
Now begin crafting a wand of ear piercing scream using the scrolls
Just to clarify you can craft using scrolls this is taken from the CRB magic item creation rules
Note that all items have prerequisites in their descriptions. These prerequisites must be met for the item to be created. Most of the time, they take the form of spells that must be known by the item's creator (although access through another magic item or spellcaster is allowed). The DC to create a magic item increases by +5 for each prerequisite the caster does not meet. The only exception to this is the requisite item creation feat, which is mandatory. In addition, you cannot create potions, spell-trigger, or spell-completion magic items without meeting their spell prerequisites.
Also all the bonuses would apply when casting from the scroll
This is also from he section about scrolls in CRB
Determine Effect: A spell successfully activated from a scroll works exactly like a spell prepared and cast the normal way. Assume the scroll spell's caster level is always the minimum level required to cast the spell for the character who scribed the scroll, unless the scriber specifically desired otherwise.
So now when you use your scrolls to cast the spell each day (4 days to craft)
Your half elf arcane training kicks in bumping the CL to 9
Also +1 for gifted adept and + 2 bumping it to CL 12
Now you have a wand of ear piercing scream at CL 12
When you activate the wand bonuses kick in again bumping it to
CL 16
Am I missing something or is this possible?