The damage between most of the more advance weapon switch combos is pretty negligible.
I would personally go with:
Reflector Starter:
M H 214L M H 214L M H 6H(x5) S j.MHHHS 22M j.3H j.236S j.236XX
Easy to do and should do about 630K with one hyper, and about 740K with two.
Reflector Starter w/ 1 Normal Assist and 1 OTG assist:
M H 6H(x5) P1 6H(x5) S j.MMHHH j.236H j.H land S j.MHHHS P2 22M j.236S j.236XX
For this combo, I personally use Tron’s Gustaff flame and Dante’s Crystal OTG. This combo gets you about the same as the above combo, but the higher execution barrier brings with it a lot more meter gain. This combo should get you roughly two meter by itself, making it great for a Phoenix team (if I’m correct in assuming Phoenix’s fireball acts as a Normal hit type move). Despite the positioning of the Partner calls in the combo, it varies depending on the speed of the assist used. For Dante, he must be called at the third 3rd 6H if done as fast as possible. Tron must be called at the 4th.
Glaive starter:
M H 2H 236L L M H 236L M S j.MMS j.3H j.236S j.236XX
Short, sweet, and to-the-point. If you don’t start with a M, you need to amend the start to L/2L M 2H.
Instant Overhead Glaive Starter:
j.L j.3H j.236S M H 2H 236L M S j.MMS j.3H j.236S j.236XX
Not as much damage as a M starter, but when you’ve got mix-ups like Ammy, you gotta take what you can get. And you’ll be getting it a lot. Do the j.L as soon as you leave the ground.
Bead Starter:
If you’re trying to combo with Beads, you’re most likely doing something very wrong.
I prefer to work with the Glaive more than the reflector. Easier instant overhead/low and confirmation into combo, great range, easy crossups, and shorter combos for the same damage as long reflector ones. Beads are useful against big, slow characters like Thor, Hulk, and Sentinel, and that’s really only because of Ammy’s excellent Cold Star special. Just… try not to miss with it.