In another time, [Caliban] would've been a properly designed frame that could survive with his own abilities and without archon shards.
Remove Razor [Gyre], its useless compared to all of his other abilities (which aren't great themselves). Condemn works well because it triggers his 3 into instantly recovering his shields.
Molt Augmented makes up for the lack of strength but 180% has you at 90% armor strip and getting 250 stacks puts you at well over the amount needed to fully strip.
The archon shards I have in my [Caliban] are 10% ability duration, 10% ability strength, 75% energy max, 50% energy max, and soon an amber shard to reduce casting speed. If you have a red archon shard to spare, you can afford to keep [Transient Fortitude] a little lower and keep a bit more duration.
You could swap out Arcane Energize for another arcane if you think you have too much energy.