Again, wrong. Here's my exact words from my original post:You literally said you were the best tank in the party, able to do so much nova damage it's shocked your DM on the regular, and healing good enough for it to be one of your main contributions. Oh! And you have the sneaky skills of a Rogue on top. How is that not describing being extremely powerful at basically everything?
"What he IS able to do is keep up with any other character build (front line, stealth, healer), heal them of wounds and disease, zip around the battlefield massively disrupting enemy attacks, survive attacks that have trashed single-class members of his party (yay, Shield spell!), and, more often than not, dish out a nova attack that can shock a DM."
There is nothing in the above about the character being "the best tank in the party"; the single-class member was a fighter in medium armor (AC18) who got bitten by a dragon. My character had AC 20 armor, backed up by a Shield spell (which other posters have already explained to you is available to warlocks), for a total AC of 25 for one turn. So the roll of 20-22 range the dragon used to bite the single-class character with an AC of 19 bounced off my character with his AC of 25. Also, "keep up" doesn't mean be better than a dedicated one-class character. It means "help out".
And, yes, being able to cast Cure Light Wound immediately after using a paladin's Lay On Hands has been extremely useful to the party. As has the ability to combine damage from Smite, Sneak Attack, and Hexblade's Curse simultaneously. And he can stealth while wearing light armor, as any character with at least one level of Rogue can.
The character will always be outclassed in any one ability by a single-class character that has specialized in that ability. But the versatility of combining lower level abilities from multiple classes allow my character to accomplish some things single-class characters simply can't. That doesn't make the character a god but it does give him a chance to be useful in most (but not all) situations.
If you want to call this "extremely powerful", fine. You haven't see my rotten dice rolls.