Even without a /click setup, there are a couple simple steps you can take to increase your warlock's dps:
Put Curse of Elements on a separate macro so it is only cast once on each target, and include conflagrate and chaos bolt in your rotation.
Something like this should give you better results:
#showtooltip
/assist Smokar
/castsequence reset=target/combat Curse of Elements, null
/castsequence reset=target/combat Immolate, Incinerate, Conflagrate, Chaos Bolt, Life Tap, Incinerate, Incinerate, Incinerate
Its not pretty, nor a very good rotation, but it should give you better results than your current macro without /click.
Getting a proper /click macro however, would be much better, most likely. It really depends more how regularly you can/will be hitting your dps macro.
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