High CL- Conj or Tra?

[Fero]

On another post Anthrowhale suggested Theurgic Specialist for a Druid/Wizard Arcane Hierophant build. In essence, it lets me super charge my caster level for one school of magic and seems like a fun cornerstone for a build. From some quick theorycrafting I think I could boost my CL to around 20 to 30 for one school by level 10. The question then becomes, what school? From my review, Conjuration and Transmutation seem like the best choices. As such, I am trying to identify spells that have exceptional or unlimited CL scaling for each school. So far I have:

Both
1- Any hour duration buff (can extend to multiple days)
2- 10/min/level buffs (can extend to last most of an adventuring day)
3- anything with Echoing Spell

Conjuration
1- Phantom Steed (early flight)
2- Phantom Stag (early etherealness)
3- Black Tentacles (absurd grapple checks)

Transmutation
1- Giant Vermin (Collosul vermin by level 10)
2- Control Winds (Tornado force winds)
3- Shrink Item (increase the size of what I can shrink)
4- Venomfire (I always feel Icky about this bit it is undeniably good).

Does anyone have other suggestions for either school?

[Anthrowhale]

Venomfire on a Fleshraker AC is a classic.

Edit: I also like Wall of Sand which is a devastating BFC spell in a dungeon environment. Blinds, Deafens, Suffocates, eliminates vocal Spellcasting, and requires a strength check to move. The scaling here is in duration and area.

[Biggus]

I don't have a specific spell to contribute, but I would suggest this: unless Conj comes out well ahead, choose Trans, because there are tons of good buffs in Trans and this will make them much harder to dispel.

[Gruftzwerg]

If you wanna go for Venomfire, I suggest Spit Venom & Deadly Spittle as feats.
Now when you shape into a form with a poisonous bite, you can either spit the poison at 30ft range or even make a 15ft cone out of it. What else you can ask for?^^

edit: other option

Evocation:
- pick up the War domain with the Arcane Disciple feat
- now you get Divine Power which exchanges your BAB with your Clvl
- dip Sacred Exorcist to get a Turning Undead pool
- pick Alternate Source Spell (dragon magazine #325)
- pick Divine Metamagic

Now you can persist your spells (e.g. Divine Power).

You'll have more BAB then anything else on your lvl and with Wild Shape you can make very good use out of it.
Maybe invest into things like (Imp.)Rapidstrike/Beast Strike and (Imp.)Multiattack.

[Fero]

If you wanna go for Venomfire, I suggest Spit Venom & Deadly Spittle as feats.
Now when you shape into a form with a poisonous bite, you can either spit the poison at 30ft range or even make a 15ft cone out of it. What else you can ask for?^^

edit: other option

Evocation:
- pick up the War domain with the Arcane Disciple feat
- now you get Divine Power which exchanges your BAB with your Clvl
- dip Sacred Exorcist to get a Turning Undead pool
- pick Alternate Source Spell (dragon magazine #325)
- pick Divine Metamagic

Now you can persist your spells (e.g. Divine Power).

You'll have more BAB then anything else on your lvl and with Wild Shape you can make very good use out of it.
Maybe invest into things like (Imp.)Rapidstrike/Beast Strike and (Imp.)Multiattack.

The Venomfire combo is certainly nasty. I suppose is could have my Animal Companion pick up the feats as well and we both spray 30d6+ acid damage per round.

Divine Power is certainly amazing but I don't know much else in Evocation worth pursuing with the high CL.

[Anthrowhale]

Divine Power is certainly amazing but I don't know much else in Evocation worth pursuing with the high CL.

The obvious choice here is Word of Balance. The drawback is that it comes online late, but "everyone dies no save" is a pretty strong effect if you can avoid killing party members.