This team's not really fragile, JAWS, both Meganium and Feraligatr can endure a good amount of hits...actually, this team is pretty strong in defenses, if you ask me.
Especially Fera', since he have reasonably good defenses, and have one of the best types for a wall in-game. Water Type weakness are kindly uncommon, if you ask me, specially in-game. Two Weakness in, just, Thunder-and-Grass attacks is something i call great.
Togekiss can endure SpAtks easily, and if he's Togekiss is using my Set...he become a pure wall. And the AL is just so stupid...there's no need to worry.
And JAWS...no Sunnyday on this team. Only Meganium and Typhlosion will make good use of it, but i don't it's usable...not to mention it's cripple Feraligatr.
Defensive & Offensive Feraligatr Set:
Feraligatr@Leftovers
Careful Nature
EV's: 252 SpDef /252 HP
~Watefall
~Ice Punch/Dragon Claw
~Earthquake
~Dragon Dance
Dragon Dance will supply the lack of Adamant Nature, before someone ask it. Both Waterfall and Ice Punch will deal Ground Types that wall Earthquake. Earthquake is also walled by Flying Types; which Ice Punch deals with. Earthquake is mainly for hitting Steel types, that wall both your STAB (Waterfall) and Ice Punch, not to mention it's have a great Base Power by itself.
Dragon Claw is an option over Ice Punch, mainly because Dragon Claw is just resisted by Steel Types; whose Earthquake already deal. So it's your option, and i recommend that you use Dragon Claw too. An pure offensive Feraligatr run the same moveset, the only thing it's change it's his EV's and Nature. If you want using him as a pure sweeper, consider using those EV's (remember, he gonna exactly the same moveset, no changes):
Jolly Nature (+Speed -SpAtk)
EV's: 252 Atk/ 252 Speed
Keep the Leftovers, though, he makes good use of her due to its typing.
Also, consider this too: Togekiss>>>Typhlosion. Typhlosion is not a good poke. I wouldn't use such a thing. If you can, change him to another Fire Type, like Infernape, for example, or any other poke you prefer, really. My recommendation is a Fighting Type because i love'em, and i think i can provide a better moveset and he's probably will having better synergy with this team.
For Meganium...try sticking with this:
Meganium@Leftovers/Whatever
Careful nature
EV's: 252 HP/176 Def/82SpDef
~Swords Dance
~Body Slam
~Seed Bomb
~Leech Seed
This leave her with more options than you think.
Body Slam will supply Meganium's lack of good physical moves, not to mention it's have a nice 30% of chance to induze paralysis. While the enemy's poke is paralyzed, she gonna be faster than him and, if you're wisely enough (i suppose you are) you gonna set-up with Swords Dance and shoot a Leech Seed on the enemy, too, which'll make Meganium last longer.
Your Main attack option is Seed Bomb; which packs good base power already, and if you count STAB, it'll be doing lots of damage on anything that doesn't resist it.
The EV's push's her to a more defensive side, but it's the best she can do. Careful nature for obvious reasons, and the same with SpDef EV's. Careful+SpDef EV's will deal with most Fire Types attacks, and most of them comes in form of Special Attacks. The 252 Def EV's will do exactly the same thing as i stated above.
Well, that's it! Good luck (again) dude!
