Sorry then, moving on.

1. Well like i said when things proc you can down a Armored Ogre with more than 400+hp in a single turn and still have orange crystals to spare to do any other thing. Dagger skills seems bugged tho, when it crits it does so much damage that sometimes the game doesnt register it. A sword fighter is like a heavy machinegun a dagger rogue is like a artilery cannon in terms of damage. If you want some numbers then my Storm of Blades hits for 60+ Veteran true strikes for each hit (need spell points, use a Bard or The mage with the blade buff) and Wringneck Razor's Bite (item skill) hits for more than 100+ with razor strops.

2. About healing. If the Bard shield counts as a heal then i use it every turn i see danger to my damage dealers. About real direct healing spells... i dont use it, the combat slots are too important to forsake a skill for a boring heal spell. Its all about attack, killing in the fastest turn count is the thing for me.

The only attack you'll really use a lot by late game is the basic Arcane Barrage. It's too powerful. It'll do 5-7 mental-type damage without costing Opportunity, (plus physical-type equal to whatever your current spell point total is when casting it, once you have Archmage) and will then trigger a physical-type damage AoE from Conjuror mastery for 8-12, which will chain nicely if you group up your enemies first. Since AB costs 1, and has the same chance to trigger your +1SP ability (30%), with 15 mana you can pretty reliably do 300-400 damage to a single target plus 150-250 AoE damage to everything else. AB will also Rend armor if you use the unique scepter, and the Mark explosion AoE will also spread the Rend armor in addition to its damage.

Maybe you lead with Dragon's Breath, maybe you Flurry of Blades for 30-50 damage to trigger the first Mark explosion and chain. But your main damage will be your Archmage spamming Arcane Barrage to set off Conjuror's Mark chain explosions.

Heal does low to mid 20s for 2 mana. It shows the amount healed even if more than the amount missing, but doesn't overflow in any way.

Those numbers may increase by 20-30% if you have extremely high stats, but gear is RNG and those numbers are assuming you've got decent RNG gear plus the plot drops.

I stream...A lot.

55 hours isn't really quick.
Most bugs that actually stopped my progress were combat bugging out and having to start again from previous save point, other than that one game breaking bug i was lucky to get a work around to and have a good save for.
Varies, they all scale differently with strength. At the end my warrior could one shot execute anyone at 140 or below health. Rest did about 30-40 but had a lot of chaining aoe and effects going with it, usually making it deal well over 200 in total.

Heal was about 20-30, used it twice.

The bug that was preventing me to go to Zanta is now gone.

That moment when you expect a epic fight aaaaaaaaaand its done in 2 turns...

What's the replayability like? I was able to keep leveling my destiny knight in Bard's Tale II after finishing the game. Didn't try in Bard's Tale III because I just didn't like that game as much.