The spell thematics feat? Are you describing the same feat from Magic of Faerûn? I fail to see...
Spell Thematics [General]
Magic of Faerûn, page 22
Your spells all share a theme (such as "rain" or "flame") which is apparent in their manifestation
Prerequisite: Must be able to cast at least one Illusion spell.
Benefit: Choose a theme for your spellcasting, such as “ice” or “fire” or “screaming skulls”. All spells you cast have this theme in the manifestation of their effects, although this does not actually change the spell in any way. You canot use this feat to make your manifestations invisible, and it never causes your spells to deal more damage because of the visual change. You may still cast spells without this thematic manifestation if you so choose.
Add +5 to the DC of any Spellcraft check to identify a spell cast in this manner.
I suspect you mean a "+1 caster level" ability on conjurations/summonings?
I really still do not see the problem. The 8th level cleric wasn't CR8; weakened by poison and lacking spells, he was a pushover.
TWO characters were involved in summoning their arsenal, and they blew their entire collection of spells.
lastly, Does the Blood hawk differ so much from the ordinary hawk?
Hawk CR 1/3; Size:T Type Animal; HD (1d8); hp 4; Init +3 (+3 Dex); Spd Walk 10', Fly 60'; AC 17 (flatfooted 14, touch 15), Claws +5 (1d4-2 20/x2 ); SA: +8 to Spot durring daylight; Vision: AL: Neutral; Sv: Fort +2, Ref +5, Will +2; Str 6, Dex 17, Con 10, Int 2, Wis 14, Cha 6
Skills and Feats: Listen +6, Spot +6; Weapon Finesse (Claws)
Possessions: -
Air Hawk would be
+8/+8
1d4-2 damage... and with hp: 4 & AC 20
Hawks are Tiny, and as such must enter the square of their opponents, and cannot therefore attack should their target resolve to only move (as the originating square is then regarded as a non-issue).
And notice, the standard hawk does not have a beak attack...
Average damage per hit is 1,3125 (including crits), so even at six attacks per round (three birds with two attacks each), and if they all hit, you do 7,875 damage per round.
Hardly a slayer of 8th level Half-orc Clerics.
Lastly, if it is comparative to the Eagle (which is a CR½ creature) it should then be on the SM II list...and if you are allowing Druids to summon templated animals, then Eagle(template) should be on the SNA II list. Otherwise what druid in his right mind would ever summon an ordinary Eagle? (at present on the SNA I list)
Air Eagle would be
+6/+6/+1 1d4 damage AC17 hp:5
Assuming all attacks hit, it does 7,875 damage per round, equal to 70,875 damage per round (three birds attacking with three attacks per round, assuming all hit (what do I know? The cleric is cellotaped to the ground!))
So I think we can safely assume that while they have found the air template definitely is nice on beasts that use finesse, the true error here was the blood hawk, which seems to be more equivalent to the Eagle, and therefore belongs in templated form on the SM II / SNA II list.