Freezing Invoke is nice, but it is not feasible for regular farm since it consumes a lot of ores.
As for those aoe skills ... LOL, they are everything but powerful. They do not even scratch mobs and I'm saying this as someone who's been playing an EM as main for way over a decade.
The main problem is that the wynn scales horribly at higher levels. Very expensive gear gives it little to no benefit, while a normal DD gets a nice boost at the same time (for example, 15% crit dmg for your pet is in fact only 15% of that 15%). I made a test when the exalted gear was introduced:
1. tested hunting dmg/speed/efficiency with my gear (+12 bloody retri 3SA, +10 Blessed Leather Set)
2. tested hunting in the same area with exalted retri and armor
There was little difference, definitely not worth the time and adena it cost me to obtain those items.
Another issue is that most new fancy items that nc soft comes up with do not help wynns at all, you get skill power and other stuff that does not help wynns, even the homunculus system and Tanga (P ATk) is a joke, since in order to activate the communion skill you have to use a regular attack x_O
Edit: since I'm only 107 I was not aware that we get no pets after lvl 110, this is another joke on us, since we do have lvl 119 locations and such! Thank you NC Soft for the great and well-thought design.