Consider switching to Geyser, switching magical lineage for havoc of the society, and being an Aquatic Bloodline Seeker Archetype.
You will lose 4 charisma and +2 save DC from your arcane bloodline.
Geyser is a fire spell, which means you benefit from elemental focus and greater elemental focus, which thanks to spell perfection provide +4 to your DC, bringing you back to where you started.
But the kicker is that Seeker's 15th level ability reduces the cost of metamagic by 1 when you apply them to your bloodline powers, and Geyser is a bloodline power. In fact you get it as a 4th level spell, just like a druid.
If you add Focused Spell you'll get another +4 DC against one target for +0 spell level.
You can add Persistent Spell for 2 rolls-per-damage for +1 spell level.
You can add Burning Spell for double the damage opportunities (and thus double the rolls) for +1 spell level.
Dazing only costs you +2 spell level now.
Finally, you can Heighten spell for +2, at the cost of +1 spell level.
Geyser 4 + Dazing 2 + Persistent 1 + Burning 1 + Heighten 1 + Focused 0 = Level 9 spell that costs a level 7 slot.
The DC for this spell is now 45 for one target, and 41 for all others.
Using the highest Paizo-printed reflex save of +23, the focused target (who by the way can be anyone, not just the person in the 5ft square) has a 5% chance to save, and everyone else has a 15% chance to save.
Each target must save twice whenever they take damage, which is once on the first round and twice at the start of every subsequent round (due to geyser's ongoing damage and burning spell). That means .05^6 and .15^6 chance to save, respectively. And your daze lasts 6 rounds.
True, geyser does have limits on its 50ft radius potential. But a wand of widen spell means that you'll have 5ft radius for every 5ft of ceiling. You'll almost always have at least 10ft of clearance when fighting anything larger than medium, which means at least a 10ft radius, more than enough to cover any doors.
Oh, and you can take Selective Spell (again at +0 cost!) to keep 14 of your closest friends safe from your stun.
