In a protracted boss fight, with high numbers being taken from damage, and the delays involved, you can EASILY get killed using average equipment. The boss can outlast you in the HP department, your LoHs are limited, and your best spell out there is CSW. In-melee healing is not all that plentiful.
Say, for example, you’re at the last fight in a Shroud run, taking on Harry. On a first life, an average pally will have maybe 400 – 500 HP, with 6 or 7 LoH. Without decent equipment, you take maybe four hits to bring you down to death or near-death. I can’t tell you how many times I went to LoH (when the dedicated heals were not enough to keep up with the damage I was taking), and got nailed by Harry mid-cast. BAM! Dead.
Now, knowing what I know now, I could go on about what was wrong with my pally. However, the one thing that was DEFINITELY wrong was that he had next-to-nothing as far as decent gear. This was something rectified by farming, usually with other toons.
Gear makes a significant contribution to the survivability of a paladin. And no, if your gear sucks, you will not be able to keep up with heals. Sorry.
If you’re going to be standing in the middle of the melee, and want to survive, you’re going to need healing and a means to avoid taking damage. If the way you play your toon dictates that you’ll being using AoE’s centered around you (Wail being a fine example), you’d better be able to deal more damage and heal faster than the other guy who wants to stomp on your skull. So this means adequate healing, decent protection, and so on.
If you are going to use stealth, it means using lighter armor, and killing something before it even sees you. Healing is only a factor when you get in over your head – which you should never do. Thus, self-healing is a rarity.
If you are going to be a caster standing in the back of the pack, it means instakills, diplo, and aggro management – again, healing should be a rarity, and heavy armor is a non-starter.
Playstyle means EVERYTHING when it comes to self-healing.
And last time I checked, I wasn’t brought along by the Sorc into the party, I was there before he / she got there.
If the Sorc was in BYOH mode, he/she would not have required the services of my pally. But they did. So it was not a successful “BYOH” run. It was a successful run, but not a successful BYOH run.
If I walked into a defined BYOH run – not the reluctant ones that occur more often than not, but one of those that are advertised – and either popped a hire or asked for healing, I’d probably get booted.