i think rangers + mage slow and fireballs are a good counter to ogres, as long as blizzard/D&D is nerfed to have range 5 and mana cost to like 75
problem with the strongest spells is that they are so powerful in comparison to anything else.
there're way more area of effect attacks/spells that could help out against bloodlust, without necessarily removing the insane damage that bloodlust does.
One of the other problems is that present in multiplayer, its the fact people tend to play on the fastest speed in war2, which makes impossible to micro with spells and units like rangers. Including the overall big latency. To anybody outside of russia or USA.
Skeletons definetely deserve something like 60 HP, more attack speed, a bit of armor and more damage, like on my mods. If skeletons are present in play, you will automatically see exorcism being used way more.
Flame shield is the other so undervalued and non used spell in game, which i think could be way more fun to see in action, if blizzard/D&D is nerfed in range and mana cost.