And finally gearing those combo's listed above what would gearing those combos look like. Would i be able to wear same gear on m/w as w/r and such? How cost effective would it be for the combos.
Not cost effective at all. You'll need two completely different sets for M/W (which uses cloth) and W/R (which uses chain). They also use completely different stats, as they are different classes altogether. Even W/M will be statted/geared very differently from W/R, as W/M is more of a magic user than a typical warrior.
Statting up one set is very expensive if you're using RL money (and very time consuming if you aren't). Statting two sets is something a lot of people don't do, simply because of the cost. Three sets...don't bother considering it.