As a main SMN it is true, even I think that we are a bit too flashy when we get all our aoe moves going. The combination of painflare, shadowflare, miasma II, blizz II and the occasional dragon head and deathflare do make for quite a lightshow concentrated in a very small radius (on top of mobs). I usually try to stand to the side of mobs while still hitting all of them with blizz and miasma and have had no complaints so far even if it is a bit hard for even me to see at times. Regardless, if the tank is paying attention they should not be getting hit by any AOE just as the SMN aoeing isn't. My guess is the tank was tired or just bored (like most people running dungeons for the 100th time) and was not in the mood to put in the extra effort of paying closer attention to the telegraphs. Nice to see more SMNs using all their skills to their maximum potential though, the amount of SMNs that never use either of those two skills is insane.