The only white mage trust is from windrust, yes. At least until you have completed Chains and Bonds mission of CoP. Or if you have enough fame to do the serpent generals quests. The two starter trusts in Sandy both come with cures so yes if you start out in bastok you are semi screwed. Though you have to go to the other two cities anyway for your 2-3 mission anyway. Also when is synergy not semi confusing? At least for those who don't normally use it.
To the OP if you can't find someone to craft you two behemoth daggers try finding a lower pair that has attack on them. It also never hurts to over prepare for one's maat fight.
Also to anyone doing a whm maat the easier win is to out heal him than to try and melee him down as it's hard to find and obtain good whm melee gear.