there's a bit that goes into them
the most viable is A to Z Ojama, I've managed to make A to Z with it before
I dunno about armed dragon ojama but I can give info about the A to z variant
mainly it's using ojamassimulation to make dragon buster and dragon cannon as quickly as possible
for it you play one of each yellow, black and green.
I've yet to test pink
1 armed dragon level 3 (normally only there for ojamatch fuel)
3 ojama pajama
2 of each, A assault core, B buster drake, and C crush wyvern
3 ABC dragon buster (can also be played at two, but it's up to preference)
1 of each X head cannon, Y dragon head, and Z metal tank
1 XYZ dragon cannon
and 1 A to Z
I use the rest of the extra deck for generic link monsters and a rank 2 sometimes
ojamassimulatin can recycle banished ojamas into your deck and draw one so you can use ojamagic multiple times.
That's what I know about ojamas