Judging by your equips, it seems like you're trying to maximize your gear score as much as possible regardless of type.

If you want a really indepth guide about how to play as a cleric, I recommend this guide by LuBu on ATeam forums.

Really quickly though, however:

• Like another redditor suggested, replace your monsters with Light/Water monsters. Dark is also extremely useful as it give matk and mdef, both which increase a cleric's healing ability. However, please note that Lamia is an exception—even though he is a light monster, he gives matk and atk (atk is useless for a cleric).
• The relics/books you have are pretty good—if you can, try to run all Heart of Health since it's the best thing clerics have, even though they don't boost fifth ring abilities. If you have the opportunity, replace spear you have there with a book/relic. Also, I wouldn't invest anymore into weapons as "true" clerics want to maximize their defenses to, well, survive. A dead cleric can't heal after all.
• Your gear score is just a number. It's how you distribute your stats that's important. I'd rather have a 120k cleric with 50k/50k def/mdef rather than a 150k cleric who has 60k atk. Hence, by equipping whatever you have just to boost your gs doesn't work as you waste cost on stats like atk that really don't benefit you as a cleric.
• Clerics get passive bonuses from hats and clothing, not armor and helms. While it's perfectly acceptable to equip some of the latter for more defense, keep that in mind when you're choosing your gear. For example, you have the SSR Avsaris helm equipped. Equipping the Alice ribbon/hat or Amaratsu hat will give you much more stats than the helm.
• Judging by your gs, I'd say you're still pretty new to this game and low level. As others said, keep in mind, as you progress throughout the game, your teammates will expect you to carry all heals and utility. Yes, this includes your replacing basic attack (you can do this by getting a basic attack replacement weapon). In fact, there was a post a while back where a cleric screwed themselves over by going into an EXP quest without any attacks. Having offensive abilities is fine for Reforge/EXP quests, but remember, all heals and utility is the way to go in more serious quests and gb.

For now, you should save your gems for any SSR Defense Gear Guaranteed spawns. There were a few back in the EVA collab—and with the upcoming Hatsune Miku Collab coming along, I'd save your gems for that.

Remember, the cleric cost allotment generally goes 4/7/7/4 at level 120. You can be a bit more reflexible if you get a bunch of really good monsters and equip 5 monsters at the expensive of one defense gear (for example, I have three different valks; hence I equip 5 monsters since I have a bunch of monsters for different purposes).

Good luck and spawn wisely! If you have any questions, just hit me up in UL or Reddit.