Well this set has exactly the same issues. At the very least you'll have to increase the hp.
Just compare them against the
DMG guidelines for their role/level.
For the ones who are in the
4E MM1 you can easily compare them against the rpg stats, e.g. the Elder White Dragon:
Stat Card: AC 33, Fort 34, Ref 31, Will 31, HP 290, Perception +11, Claw Damage 2d10+6.
Predator's Claw +20 vs. Ref, etc.
Breath Cone 10 +22 vs. Fort, 3d12+8 cold and -2 attack.
Icy Tomb Ranged 5, +22 vs. Fort, 4d12+8 cold and helpless, continue 4d12+8 cold.
Frightful Presence +16 vs. Will.
MM1: AC 31, Fort 32, Ref 29, Will 29, HP 850 (!), Perception +16, Claw Damage 1d10+6.
Predator's Claw -
Breath Close Blast 5 +20 vs. Reflex, 6d6+8 and slowed and weakened (save ends both).
Icy Tomb Ranged 10, +20 vs. Fort, 2d12+8 cold and restrained and stunned (save ends both).
Frightful Presence +20 vs. Will.
So, the
MM version has lower defenses (-2), a lot more hp (umm, about x3), higher perception (+5), lower damage (1/2 mostly), and lower attacks (-2). Ranges and conditions have changed (in part) and of course cones have been removed from the game.