Went to the arena just to fogure out what the cool down was on the bats rage state. theres some sort of CD there but it dosnt say anywhere. what i found was the rage mechanic is very buggy. if rage expires and youre still below 40% when the CD what ever it is expires he will not enrage again, as far as i could tell ever. unless i died or unsummoned/resummoned him. if below 40% i couldnt summon. sometimes if he was enraged then went back to normal he no longer did his follow up attacks during skills. unless i died or resummoned. it was very difficult to get the bat to act correctly in pvp after engraging, in general. I've seen it get mad multiple times while PVE but honestly not really watching that as the added damage isnt that much in PVE.

Is there some trick im missing? some mechanic im missing or not understanding or is the bat just buggy as heck? 

PA change how Axian's rage works few months ago, you can come to the Nova's discord if you want. https://discord.gg/4PrzEHm
All the infos are there and we probably can help you.

na thats ok thanks for the offer. its been my exp that the class discords are very toxic. 

I've been part of the nova discord for quite sometime, I've only encountered helpful people. Most are really nice. At least the succ nova section, I haven't really interacted with the awak one.