I haven't gotten any templar gear PVP tips, in fact there seem to be few templars in Siel -elyos.
As soon as starting with the stun from a distance it is a good idea as long as they are not cloth (they have shields).
As for the set, I have a friend who already has 4/5 pieces of E55 pvp and it continues to make it difficult for him to PVP (with a player with a similar set) and the new class lowers his HP very quickly.
Now I'm thinking that it would be nice to have an additional magic resist set to the full attack set.
I hope some experienced geared templar will give good advice for pvp, SET, manastone, or statistics etc.