I’d forgotten about delves . Elementalist would be a good choice here indeed. But I’d still pick Titan for its 50% mana start. Dying isn’t really a concern.
I’ll give that a try, thank you.
My thought process:
The game is designed such that the attacker gets board advantage on turn 0, the defender gets trait/talent advantage on turn 0.
To win against an attacker, the defender must survive at least one turn.
Thus, delaying or preventing an attacker from killing your most valuable unit (more often than not Doomed Book) is paramount.
The best tools at our disposal to delay losing on turn 0 currently are: ‘Flash Freeze’, ‘Stealthy’.
One depends on the inability of the enemy team to get rid of the ‘Frozen’ status, the other on the inability of the attacker to stun away ‘Stealthy’ and instantly kill your MVU.
The value of these talents varies wildly depending on the colour of the day.
Your team might encounter an attacking Obsidius on three days, dramatically lowering the value of ‘Stealthy’ on those. This can be partly offset by using Mercy or Sister Superior on your team.
Conversely, ‘Flash Freeze’ tanks in value if the enemy has easy access to cleanse/bless, which is true of at least green, blue, yellow, purple, red days.
→ Getting to turn 1 as Elementalist is not as easy as it is for Thieves on most days.
Assuming both teams get to turn 1:
Elementalist has access to 50% mana start on a single day (if you want to avoid the point penalty), making it quite a bit harder to fill your weapon.
Thus, you should consider alternatives or additions to Empowered Converters to gather mana for your hero.
However, your trait only activates on match-4s.
Thief already starts with 50% mana. It is more likely to fill itself on turn 1 and proceed to win on the same turn.
→ Thief tends to have a better turn 1.
Elementalist lacks strong comeback mechanics. Once the rest of your team is gone, you need skyfall luck and hope your weapon is powerful enough to win the match.
Thief has several comeback mechanics (resummon on enemy death, resummon on cast, resummon on ally death, ‘Rising Shadows’).
→ Thief is more likely to claw itself back.
This is why I do not think Elementalist is the best class for GW defence.
Edit: I’ll be using Elementalist on 2 out of 6 days because I believe despite those shortcomings, Elementalist has its merits and might outperform Thieves on those days.