Ok, we have some focus now haha
Before it got a bit confusing but now you just stated exactly what you need in one shot without going against the build you are asking for.
This build works, yes. If you learn how to play with it you will be able to be a decent healer, protect your party and do some dps. You will be able to solo too, Paladin C3 is good for PvE. For PvP you can add some CON and survive, heal and ress your party, use PD skills here and there, etc, but Paladins will not do great in PvP when compared to other PvP typical classes. At least not for now.
Btw, I suggest you max Divine Might instead of Cure!
I completely understand your confusion with this mechanic! It’s a different system from RO and other games, I always played as FS too and I know how we usually were asked to cover many different roles in a party. I actually liked that for the challenge - and only when I was playing with someone who knew wth they were doing, of course (and polite people) haha
The way ToS works with the idea of support is not that bad, and it’s fun having to learn again how to build something functional (and trying to focus more on what exactly we liked in supporting roles!). Imagine that the classical FS and cleric classes we know from other games were fragmented and each fragment could have a new purpose when rearranged xD
And hey, if you like PvP I think it is worth researching more about different suitable classes and builds! You don’t need to be Paladin! You can build something that can be used decently in PvP and PvE.