Johannes
Arcane
Rather than making them more durable, change the "lethal shots" ability the cannons and bolt throwers have, from doing 2 wounds of damage for a single hit, to getting a bonus for wounding easier. Either -1 save, or forced reroll on success.Have you run into a wood elf fight yet? 3 units of archers can delete one of your units a turn no problem. It's fucking brutal if you don't have a way to fight back. I was playing humans with a dorf cannon and a city guard elf unit allied in and they did so much damage it was impossible to win the next battle. Undead grinding down my already weakened units fucking sucked.I got longbows on my Elves infantry in campaign. Can any other unit get that too? That was a gamechanger.
Chariots need a buff. I'm thinking 5-6 wounds would be a good place for them. It's too easy to do 4 wounds on them with a single cannon or decent ranged unit. Either 5 or 6 would push them just over the safety threshhold so they're not killed by a stiff wind.
RN you always get at least 5+ saves on the Power vs Defence roll, so no matter your weapon power there's a good chance a goblin will save vs a cannon or bolt thrower shot. The chariot will get that same save, but will take twice the damage.