Dump Cleric, add Skaldic Rage (WC Core 1) and you can use a song to rage and still cast spells (and have longer duration on the Rage). Focus on more songs, and/or enhancements that avoid the post-rage crash.
o https://ddowiki.com/page/Warchanter_enhancements#Core
Could certainly be fun & might be a little easier on feats with the racial abilities. I've been running a 13 bard/2 fighter/5 barb version of this build as a shadar-kai for a while (LR heart was involved, naturally) & it's great fun, has a solid thwack with handaxe & having the chain attack too is downright murderous.
I used to be with it, but then they changed what it was, now what's it is weird and scary to me.