The runes are avoided because they provide a buff that chronomancers have a variety of ways to acquire that don’t involve sacrificing the runes for. You can get quickness from the well of action, from shield 5, from an interrupt trait, or from traited shatters. Mix and match those to get your quickness instead.
Additionally, you’d have to actually use wells. Using wells and being a “hardcore bursting mesmer” are mutually exclusive. Wells, with the exception of gravity well, are slow and weak in PvP. Necromancer wells are powerful utilities with a significant impact on a fight. Mesmer wells are annoying visual clutter that you mostly ignore.