what Bas says about Resists is important
but it’s also not the only defensive shortcoming (and that’s important for Veteran especially)
Armour rating and armour absorb, since basically 98% of all enemies deal some form of physical dmg
Healing aka sustain, “recovering health from dmg taken, - outside of healing potion since it has cooldown”. You need lifesteal(Attack Damage Converted to Health) and or health regen and or heal procs, either or combinations of these to basically keep your health bar topped off 24/7.
With Forcewave, since it uses weapon dmg, global lifesteal is great, Since you’re Soldier class health regen is also great, combine these 2 avenues, while fixing your resist and armour rating/absorb, and you will be like playing with Godmode on.
If you do not wish to pay attention to these elements as strictly and detailedly, i would recommend you play on Normal instead, as it’s way more lenient in the amounts of these that will be required but also how late/what stage of the game.
If when you did/do continue to play and advance later into the game or even Elite it will all become basically mandatory tho.
in essence it’s not dissimilar to other games, where diablo 2 had pot spam GD just moved that to be stats(lifesteal/regen) and the potion is more like a backup skill for emergencies. Likewise other games have other defensive stats to focus in for GD it’s then resist and armour as core defence
and like i mentioned earlier, if when that is done, the game becomes very easy/almost like playing with dev commands or godmode on, and i promise you that can be done/that stage can be reach especially for a FW soldier