So I'm currently playing in a Pathfinder campaign as an evil Cleric/Dragon Disciple (house ruled the arcane requirements for other things obviously), and I'm kinda feeling like I'm missing something.. Don't get me wrong, I'm not at all complaining about the power level of my character compared to the others in the party, I'm probably the "strongest" of them all at this point, but I do feel like there are things I'm forgetting about that I could/should be doing.

So what I'm asking for I guess is possible spell combos, and effective feats in PF since they nixed the persistent cheese. I need ideas for both in and out of combat.

To breakdown my character:
Level: 13
Alignment: LE
Race: Half-elf
Class: Cleric/Dragon Disciple
Spells: 6th lvl
Domains: Death and Destruction
AC: 36ish?
Some feats include: Channel Smite, Craft wondrous (eyeing lichdom), toughness, spell focus (necro), brew potion, among other things that arent coming to mind..
I'm already buffing with the standard Shield of Fath, Divine Favor/Power, Righteous Might, etc. for when I'm in melee..

Any ideas and out-of-the-box thinking would be much appreciated. Thanks.