Energy Blast is a very weak skill to begin with, so the boost from Deploy Cappella is quite redundant especially if you did not enhance Deploy Cappella and Energy Blast high enough, to be honest.
For Chaplain, Aspergillum is your main damage source in an auto-attack playstyle given that you are able to max enhance Aspergillum and Deploy Cappella’s increased holy damage up to 80% full uptime. In terms of the auto-attack playstyle, Last Rites is actually your second main damage source if you can stack as much stats as possible into it, though the increase in damage per level isn’t that great so leaving it at 1 is fine.
Assuming you maxed Aspergilum and Deploy Cappella, and left Last Rites and Visible Talent at least 1 point each, your remaining 18 point allocation will depend on your build, weapon and whether you PvP or not. A skill spamming class only takes Chaplain for Deploy Cappella and its PvP-suited skills instead of its auto-attack skills (Protection of the Goddess + Visible Talent ARTs + Deploy Cappella hits stupid hard). Beyond that, maxing Binatio is the normal choice, especially when Chaplain’s Vaivora Mace requires a LOT of additional damage stat to make much use out of the mace’s effect. With that said, auto-attacks and additional damage isn’t the ideal damage outlet in PvP. and Paraclitus Time’s knockback immunity + slow is a threat in PvP if you can make use of it, so its possible to leave Binatio at 1 just for using the Vaivora Mace’s effect sacrificing some damage for disabling opponents with Paraclitus Time.
With that said, the auto-attack playstyle really relies on investment and Wind Ark to shine. Build and skill allocation depends on preferences, playstyle and the content you’re tackling the class with.
PS: You will rarely find information on non-meta cleric classes, especially physical clerics, on forums as most of the discussion really revolves around the meta with how the game is. Most of such information is usually shared kinda privately on Discord instead of on forums.