Gemstone IV has a lot of depth. There are many classic tactics you can use, such a parry tag, combat maneuvers or spells to slow opponents down.
However, the are some more subtle tricks built right into the game. For example, going prone before an elemental wave hits will not hurt you. The same for shield bash. It is also unlikely that you would sucked into an implosion.
Going prone affects affects both offense and defense by 50 points. Choose carefully.
Sometimes, a minus 50 is better than vaporization.
Other tricks include the basic warding check. If an opponent has Fasthr’s Reward running casting a low level warding spell can trip the Reward, ending the spell. For example, Dark Catalyst costs 19 points to cast and is really expensive to cast against Reward. Blood Burst costs one point and has the same chance to trigger and eliminate this defense. Other good choices are Corrupt Essence against spell casters and Spirit Barrier against swingers. The nice thing about these cheap spells is that they can trigger the Reward even if the creature is not subject to the attack type.
For example, Purified Citadel Heralds are immune to Blood Burst due to their undead status, but Blood Burst still forces a warding check. This effect is the same as casting Limb Disrupt on a creature with no limbs, you can succeed in overwhelming their TD or Target Defense, but that success will not effect a creature with no limbs.
Old Golems used to be puncture immune; it is the exact same situation, you can hit them with an arrow but it doesn’t do anything. This has been remedied my changing Golems to “puncture resistance”, so current Golems aren’t a good analogy any more. Certain creatures are completely immune to magic, trying this stunt is a waste of time. Vvreal and Constructs come to mind.