So I have a rod of extend (lesser), and I was wondering what other spells other than water breathing and the protection from X spells are worth while to use it on.
Also, I plan on getting the mid range extend rod later on, so if anyone has advice on level 4-6 spells that work well with this rod, it would be appreciated; I'm not as familiar with the cleric spell list.
Summon monster spells are an obvious one. Pretty much anything with 1 round/level duration can benefit from this.
Beyond that, pretty much any buff spell can be handy if you don't have a 15-minute adventuring day. Minute-per-level spells last longer during a dungeon raid. 10 minute-per-level spells will likely last for an entire incursion so long as no overland travel or long delays are involved. Hour-per-level spells become all-day spells, or nearly so.