Nostalrius Begins - Quality wow vanilla realm (1.12)

So have been healing battlegrounds for few months now, in pugs but mostly premades and am looking for some input on how other priests heal bgs. I have been using Luna frames which I find extremely helpful due to it having incoming heal, dispell pictures so I know who is steeped etc and the range filter. Usually when I am say in a group fight at blacksmith or whatever I use click casting and dispelling as I find it really quick .

The only downside to this is I am focussing too hard on my raid frames and not seeing what's happening in the battle in front of me. the effect of this means sometimes I will be spam clicking flash heal on someone on my raid frames and not notice for some seconds they are actually out of range ( due to Luna range filter not being totally accurate). Or someone is taking damage just out my range and I'm not in Los, but since I have been staring at my raid frames I have no idea where they are so I waste time by mind visioning.

Often times also feel like there is so much going on at once I'm not sure which to prioritise. I first prioritise sleeps on other healers then healing. But I have been told about dispelling enemies and putting up trash buffs on friendly players. Not sure how it's possible to do this as well since if I start focussing on offensive dispelling or trash buffs one of our players will die.

Curious how other priests go about healing bgs whether click casting raid frames or using Ctrl v nameplates or something else quicker

Make your HUD more centralized. Key cooldown abilities can be shown right next to your character by putting them on a separate, hotkeyless action bar. Move your target, yourself and your party frames from the top/left edge to somewhere more in the middle (I like to have my target and my frame below my char). Buffs/debuffs in the top right is also way out of the way; put em in the center somewhere.

Pretty easy to watch raid frames, debuffs and combat when they are all beside each other.